Index: frontend/node_modules/stackframe/LICENSE
===================================================================
--- frontend/node_modules/stackframe/LICENSE	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/stackframe/LICENSE	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,19 @@
+Copyright (c) 2017 Eric Wendelin and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
Index: frontend/node_modules/stackframe/README.md
===================================================================
--- frontend/node_modules/stackframe/README.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/stackframe/README.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,79 @@
+stackframe 
+==========
+## JS Object representation of a stack frame
+
+[![Build Status](https://img.shields.io/github/workflow/status/stacktracejs/stackframe/Continuous%20Integration/master?logo=github&style=flat-square)](https://github.com/stacktracejs/stackframe/actions?query=workflow%3AContinuous+Integration+branch%3Amaster)
+[![Coverage Status](https://img.shields.io/coveralls/stacktracejs/stackframe.svg?style=flat-square)](https://coveralls.io/r/stacktracejs/stackframe?branch=master)
+[![GitHub license](https://img.shields.io/github/license/stacktracejs/stackframe.svg?style=flat-square)](https://opensource.org/licenses/MIT)
+[![dependencies](https://img.shields.io/badge/dependencies-0-green.svg?style=flat-square)](https://github.com/stacktracejs/stackframe/releases)
+[![gzip size](https://img.shields.io/badge/gzipped-0.96k-green.svg?style=flat-square)](https://github.com/stacktracejs/stackframe/releases)
+[![module format](https://img.shields.io/badge/module%20format-umd-lightgrey.svg?style=flat-square&colorB=ff69b4)](https://github.com/stacktracejs/stackframe/releases)
+[![code of conduct](https://img.shields.io/badge/code%20of-conduct-lightgrey.svg?style=flat-square&colorB=ff69b4)](http://todogroup.org/opencodeofconduct/#stacktrace.js/me@eriwen.com)
+
+Underlies functionality of other modules within [stacktrace.js](https://www.stacktracejs.com).
+
+Written to closely resemble StackFrame representations in [Gecko](http://mxr.mozilla.org/mozilla-central/source/xpcom/base/nsIException.idl#14) and [V8](https://github.com/v8/v8/wiki/Stack%20Trace%20API)
+
+## Usage
+```js
+// Create StackFrame and set properties
+var stackFrame = new StackFrame({
+    functionName: 'funName',
+    args: ['args'],
+    fileName: 'http://localhost:3000/file.js',
+    lineNumber: 1,
+    columnNumber: 3288, 
+    isEval: true,
+    isNative: false,
+    source: 'ORIGINAL_STACK_LINE'
+    evalOrigin: new StackFrame({functionName: 'withinEval', lineNumber: 2, columnNumber: 43})
+});
+
+stackFrame.functionName      // => "funName"
+stackFrame.setFunctionName('newName')
+stackFrame.getFunctionName() // => "newName"
+
+stackFrame.args              // => ["args"]
+stackFrame.setArgs([])
+stackFrame.getArgs()         // => []
+
+stackFrame.fileName          // => 'http://localhost:3000/file.min.js'
+stackFrame.setFileName('http://localhost:3000/file.js')  
+stackFrame.getFileName()     // => 'http://localhost:3000/file.js'
+
+stackFrame.lineNumber        // => 1
+stackFrame.setLineNumber(325)
+stackFrame.getLineNumber()   // => 325
+
+stackFrame.columnNumber      // => 3288
+stackFrame.setColumnNumber(20)
+stackFrame.getColumnNumber() // => 20
+
+stackFrame.source            // => 'ORIGINAL_STACK_LINE'
+stackFrame.setSource('NEW_SOURCE')
+stackFrame.getSource()       // => 'NEW_SOURCE'
+
+stackFrame.isEval            // => true
+stackFrame.setIsEval(false)
+stackFrame.getIsEval()       // => false
+
+stackFrame.isNative          // => false
+stackFrame.setIsNative(true)
+stackFrame.getIsNative()     // => true
+
+stackFrame.evalOrigin                         // => StackFrame({functionName: 'withinEval', lineNumber: ...})
+stackFrame.setEvalOrigin({functionName: 'evalFn', fileName: 'anonymous'})
+stackFrame.getEvalOrigin().getFunctionName()  // => 'evalFn'
+
+stackFrame.toString() // => 'funName(args)@http://localhost:3000/file.js:325:20'
+```
+
+## Browser Support
+[![Sauce Test Status](https://saucelabs.com/browser-matrix/stacktracejs.svg)](https://saucelabs.com/u/stacktracejs)
+
+## Installation
+```
+npm install stackframe
+bower install stackframe
+https://raw.githubusercontent.com/stacktracejs/stackframe/master/dist/stackframe.min.js
+```
Index: frontend/node_modules/stackframe/dist/stackframe.js
===================================================================
--- frontend/node_modules/stackframe/dist/stackframe.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/stackframe/dist/stackframe.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,143 @@
+(function(root, factory) {
+    'use strict';
+    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js, Rhino, and browsers.
+
+    /* istanbul ignore next */
+    if (typeof define === 'function' && define.amd) {
+        define('stackframe', [], factory);
+    } else if (typeof exports === 'object') {
+        module.exports = factory();
+    } else {
+        root.StackFrame = factory();
+    }
+}(this, function() {
+    'use strict';
+    function _isNumber(n) {
+        return !isNaN(parseFloat(n)) && isFinite(n);
+    }
+
+    function _capitalize(str) {
+        return str.charAt(0).toUpperCase() + str.substring(1);
+    }
+
+    function _getter(p) {
+        return function() {
+            return this[p];
+        };
+    }
+
+    var booleanProps = ['isConstructor', 'isEval', 'isNative', 'isToplevel'];
+    var numericProps = ['columnNumber', 'lineNumber'];
+    var stringProps = ['fileName', 'functionName', 'source'];
+    var arrayProps = ['args'];
+    var objectProps = ['evalOrigin'];
+
+    var props = booleanProps.concat(numericProps, stringProps, arrayProps, objectProps);
+
+    function StackFrame(obj) {
+        if (!obj) return;
+        for (var i = 0; i < props.length; i++) {
+            if (obj[props[i]] !== undefined) {
+                this['set' + _capitalize(props[i])](obj[props[i]]);
+            }
+        }
+    }
+
+    StackFrame.prototype = {
+        getArgs: function() {
+            return this.args;
+        },
+        setArgs: function(v) {
+            if (Object.prototype.toString.call(v) !== '[object Array]') {
+                throw new TypeError('Args must be an Array');
+            }
+            this.args = v;
+        },
+
+        getEvalOrigin: function() {
+            return this.evalOrigin;
+        },
+        setEvalOrigin: function(v) {
+            if (v instanceof StackFrame) {
+                this.evalOrigin = v;
+            } else if (v instanceof Object) {
+                this.evalOrigin = new StackFrame(v);
+            } else {
+                throw new TypeError('Eval Origin must be an Object or StackFrame');
+            }
+        },
+
+        toString: function() {
+            var fileName = this.getFileName() || '';
+            var lineNumber = this.getLineNumber() || '';
+            var columnNumber = this.getColumnNumber() || '';
+            var functionName = this.getFunctionName() || '';
+            if (this.getIsEval()) {
+                if (fileName) {
+                    return '[eval] (' + fileName + ':' + lineNumber + ':' + columnNumber + ')';
+                }
+                return '[eval]:' + lineNumber + ':' + columnNumber;
+            }
+            if (functionName) {
+                return functionName + ' (' + fileName + ':' + lineNumber + ':' + columnNumber + ')';
+            }
+            return fileName + ':' + lineNumber + ':' + columnNumber;
+        }
+    };
+
+    StackFrame.fromString = function StackFrame$$fromString(str) {
+        var argsStartIndex = str.indexOf('(');
+        var argsEndIndex = str.lastIndexOf(')');
+
+        var functionName = str.substring(0, argsStartIndex);
+        var args = str.substring(argsStartIndex + 1, argsEndIndex).split(',');
+        var locationString = str.substring(argsEndIndex + 1);
+
+        if (locationString.indexOf('@') === 0) {
+            var parts = /@(.+?)(?::(\d+))?(?::(\d+))?$/.exec(locationString, '');
+            var fileName = parts[1];
+            var lineNumber = parts[2];
+            var columnNumber = parts[3];
+        }
+
+        return new StackFrame({
+            functionName: functionName,
+            args: args || undefined,
+            fileName: fileName,
+            lineNumber: lineNumber || undefined,
+            columnNumber: columnNumber || undefined
+        });
+    };
+
+    for (var i = 0; i < booleanProps.length; i++) {
+        StackFrame.prototype['get' + _capitalize(booleanProps[i])] = _getter(booleanProps[i]);
+        StackFrame.prototype['set' + _capitalize(booleanProps[i])] = (function(p) {
+            return function(v) {
+                this[p] = Boolean(v);
+            };
+        })(booleanProps[i]);
+    }
+
+    for (var j = 0; j < numericProps.length; j++) {
+        StackFrame.prototype['get' + _capitalize(numericProps[j])] = _getter(numericProps[j]);
+        StackFrame.prototype['set' + _capitalize(numericProps[j])] = (function(p) {
+            return function(v) {
+                if (!_isNumber(v)) {
+                    throw new TypeError(p + ' must be a Number');
+                }
+                this[p] = Number(v);
+            };
+        })(numericProps[j]);
+    }
+
+    for (var k = 0; k < stringProps.length; k++) {
+        StackFrame.prototype['get' + _capitalize(stringProps[k])] = _getter(stringProps[k]);
+        StackFrame.prototype['set' + _capitalize(stringProps[k])] = (function(p) {
+            return function(v) {
+                this[p] = String(v);
+            };
+        })(stringProps[k]);
+    }
+
+    return StackFrame;
+}));
Index: frontend/node_modules/stackframe/dist/stackframe.min.js
===================================================================
--- frontend/node_modules/stackframe/dist/stackframe.min.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/stackframe/dist/stackframe.min.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,2 @@
+!function(t,e){"use strict";"function"==typeof define&&define.amd?define("stackframe",[],e):"object"==typeof exports?module.exports=e():t.StackFrame=e()}(this,function(){"use strict";function t(t){return t.charAt(0).toUpperCase()+t.substring(1)}function e(t){return function(){return this[t]}}var r=["isConstructor","isEval","isNative","isToplevel"],n=["columnNumber","lineNumber"],i=["fileName","functionName","source"],o=r.concat(n,i,["args"],["evalOrigin"]);function s(e){if(e)for(var r=0;r<o.length;r++)void 0!==e[o[r]]&&this["set"+t(o[r])](e[o[r]])}s.prototype={getArgs:function(){return this.args},setArgs:function(t){if("[object Array]"!==Object.prototype.toString.call(t))throw new TypeError("Args must be an Array");this.args=t},getEvalOrigin:function(){return this.evalOrigin},setEvalOrigin:function(t){if(t instanceof s)this.evalOrigin=t;else{if(!(t instanceof Object))throw new TypeError("Eval Origin must be an Object or StackFrame");this.evalOrigin=new s(t)}},toString:function(){var t=this.getFileName()||"",e=this.getLineNumber()||"",r=this.getColumnNumber()||"",n=this.getFunctionName()||"";return this.getIsEval()?t?"[eval] ("+t+":"+e+":"+r+")":"[eval]:"+e+":"+r:n?n+" ("+t+":"+e+":"+r+")":t+":"+e+":"+r}},s.fromString=function(t){var e=t.indexOf("("),r=t.lastIndexOf(")"),n=t.substring(0,e),i=t.substring(e+1,r).split(","),o=t.substring(r+1);if(0===o.indexOf("@"))var u=/@(.+?)(?::(\d+))?(?::(\d+))?$/.exec(o,""),a=u[1],f=u[2],c=u[3];return new s({functionName:n,args:i||void 0,fileName:a,lineNumber:f||void 0,columnNumber:c||void 0})};for(var u=0;u<r.length;u++)s.prototype["get"+t(r[u])]=e(r[u]),s.prototype["set"+t(r[u])]=function(t){return function(e){this[t]=Boolean(e)}}(r[u]);for(var a=0;a<n.length;a++)s.prototype["get"+t(n[a])]=e(n[a]),s.prototype["set"+t(n[a])]=function(t){return function(e){if(r=e,isNaN(parseFloat(r))||!isFinite(r))throw new TypeError(t+" must be a Number");var r;this[t]=Number(e)}}(n[a]);for(var f=0;f<i.length;f++)s.prototype["get"+t(i[f])]=e(i[f]),s.prototype["set"+t(i[f])]=function(t){return function(e){this[t]=String(e)}}(i[f]);return s});
+//# sourceMappingURL=stackframe.min.js.map
Index: frontend/node_modules/stackframe/dist/stackframe.min.js.map
===================================================================
--- frontend/node_modules/stackframe/dist/stackframe.min.js.map	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/stackframe/dist/stackframe.min.js.map	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,1 @@
+{"version":3,"sources":["stackframe.js"],"names":["root","factory","define","amd","exports","module","StackFrame","this","_capitalize","str","charAt","toUpperCase","substring","_getter","p","booleanProps","numericProps","stringProps","props","concat","obj","i","length","undefined","prototype","getArgs","args","setArgs","v","Object","toString","call","TypeError","getEvalOrigin","evalOrigin","setEvalOrigin","fileName","getFileName","lineNumber","getLineNumber","columnNumber","getColumnNumber","functionName","getFunctionName","getIsEval","fromString","argsStartIndex","indexOf","argsEndIndex","lastIndexOf","split","locationString","parts","exec","Boolean","j","n","isNaN","parseFloat","isFinite","Number","k","String"],"mappings":"CAAC,SAASA,EAAMC,GACZ,aAIsB,mBAAXC,QAAyBA,OAAOC,IACvCD,OAAO,gBAAkBD,GACC,iBAAZG,QACdC,OAAOD,QAAUH,IAEjBD,EAAKM,WAAaL,IAV1B,CAYEM,KAAM,WACJ,aAKA,SAASC,EAAYC,GACjB,OAAOA,EAAIC,OAAO,GAAGC,cAAgBF,EAAIG,UAAU,GAGvD,SAASC,EAAQC,GACb,OAAO,WACH,OAAOP,KAAKO,IAIpB,IAAIC,GAAgB,gBAAiB,SAAU,WAAY,cACvDC,GAAgB,eAAgB,cAChCC,GAAe,WAAY,eAAgB,UAI3CC,EAAQH,EAAaI,OAAOH,EAAcC,GAH5B,SACC,eAInB,SAASX,EAAWc,GAChB,GAAKA,EACL,IAAK,IAAIC,EAAI,EAAGA,EAAIH,EAAMI,OAAQD,SACRE,IAAlBH,EAAIF,EAAMG,KACVd,KAAK,MAAQC,EAAYU,EAAMG,KAAKD,EAAIF,EAAMG,KAK1Df,EAAWkB,WACPC,QAAS,WACL,OAAOlB,KAAKmB,MAEhBC,QAAS,SAASC,GACd,GAA0C,mBAAtCC,OAAOL,UAAUM,SAASC,KAAKH,GAC/B,MAAM,IAAII,UAAU,yBAExBzB,KAAKmB,KAAOE,GAGhBK,cAAe,WACX,OAAO1B,KAAK2B,YAEhBC,cAAe,SAASP,GACpB,GAAIA,aAAatB,EACbC,KAAK2B,WAAaN,MACf,CAAA,KAAIA,aAAaC,QAGpB,MAAM,IAAIG,UAAU,+CAFpBzB,KAAK2B,WAAa,IAAI5B,EAAWsB,KAMzCE,SAAU,WACN,IAAIM,EAAW7B,KAAK8B,eAAiB,GACjCC,EAAa/B,KAAKgC,iBAAmB,GACrCC,EAAejC,KAAKkC,mBAAqB,GACzCC,EAAenC,KAAKoC,mBAAqB,GAC7C,OAAIpC,KAAKqC,YACDR,EACO,WAAaA,EAAW,IAAME,EAAa,IAAME,EAAe,IAEpE,UAAYF,EAAa,IAAME,EAEtCE,EACOA,EAAe,KAAON,EAAW,IAAME,EAAa,IAAME,EAAe,IAE7EJ,EAAW,IAAME,EAAa,IAAME,IAInDlC,EAAWuC,WAAa,SAAgCpC,GACpD,IAAIqC,EAAiBrC,EAAIsC,QAAQ,KAC7BC,EAAevC,EAAIwC,YAAY,KAE/BP,EAAejC,EAAIG,UAAU,EAAGkC,GAChCpB,EAAOjB,EAAIG,UAAUkC,EAAiB,EAAGE,GAAcE,MAAM,KAC7DC,EAAiB1C,EAAIG,UAAUoC,EAAe,GAElD,GAAoC,IAAhCG,EAAeJ,QAAQ,KACvB,IAAIK,EAAQ,gCAAgCC,KAAKF,EAAgB,IAC7Df,EAAWgB,EAAM,GACjBd,EAAac,EAAM,GACnBZ,EAAeY,EAAM,GAG7B,OAAO,IAAI9C,GACPoC,aAAcA,EACdhB,KAAMA,QAAQH,EACda,SAAUA,EACVE,WAAYA,QAAcf,EAC1BiB,aAAcA,QAAgBjB,KAItC,IAAK,IAAIF,EAAI,EAAGA,EAAIN,EAAaO,OAAQD,IACrCf,EAAWkB,UAAU,MAAQhB,EAAYO,EAAaM,KAAOR,EAAQE,EAAaM,IAClFf,EAAWkB,UAAU,MAAQhB,EAAYO,EAAaM,KAAO,SAAUP,GACnE,OAAO,SAASc,GACZrB,KAAKO,GAAKwC,QAAQ1B,IAFmC,CAI1Db,EAAaM,IAGpB,IAAK,IAAIkC,EAAI,EAAGA,EAAIvC,EAAaM,OAAQiC,IACrCjD,EAAWkB,UAAU,MAAQhB,EAAYQ,EAAauC,KAAO1C,EAAQG,EAAauC,IAClFjD,EAAWkB,UAAU,MAAQhB,EAAYQ,EAAauC,KAAO,SAAUzC,GACnE,OAAO,SAASc,GACZ,GA9GO4B,EA8GQ5B,EA7Gf6B,MAAMC,WAAWF,MAAOG,SAASH,GA8G7B,MAAM,IAAIxB,UAAUlB,EAAI,qBA/GxC,IAAmB0C,EAiHPjD,KAAKO,GAAK8C,OAAOhC,IALoC,CAO1DZ,EAAauC,IAGpB,IAAK,IAAIM,EAAI,EAAGA,EAAI5C,EAAYK,OAAQuC,IACpCvD,EAAWkB,UAAU,MAAQhB,EAAYS,EAAY4C,KAAOhD,EAAQI,EAAY4C,IAChFvD,EAAWkB,UAAU,MAAQhB,EAAYS,EAAY4C,KAAO,SAAU/C,GAClE,OAAO,SAASc,GACZrB,KAAKO,GAAKgD,OAAOlC,IAFmC,CAIzDX,EAAY4C,IAGnB,OAAOvD"}
Index: frontend/node_modules/stackframe/package.json
===================================================================
--- frontend/node_modules/stackframe/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/stackframe/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,59 @@
+{
+  "name": "stackframe",
+  "description": "JS Object representation of a stack frame",
+  "maintainers": [
+    "Eric Wendelin <me@eriwen.com> (https://www.eriwen.com)",
+    "Victor Homyakov <vkhomyackov@gmail.com> (https://github.com/victor-homyakov)",
+    "Oliver Salzburg (https://github.com/oliversalzburg)"
+  ],
+  "version": "1.3.4",
+  "license": "MIT",
+  "keywords": [
+    "stacktrace",
+    "error",
+    "debugger",
+    "stack frame"
+  ],
+  "homepage": "https://www.stacktracejs.com",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/stacktracejs/stackframe.git"
+  },
+  "devDependencies": {
+    "eslint": "^8.17.0",
+    "jasmine": "^4.1.0",
+    "jasmine-core": "^4.1.1",
+    "karma": "^6.3.20",
+    "karma-chrome-launcher": "^3.1.1",
+    "karma-coverage": "^2.2.0",
+    "karma-coveralls": "^2.1.0",
+    "karma-firefox-launcher": "^2.1.2",
+    "karma-ie-launcher": "^1.0.0",
+    "karma-jasmine": "^4.0.2",
+    "karma-opera-launcher": "^1.0.0",
+    "karma-phantomjs-launcher": "^1.0.4",
+    "karma-safari-launcher": "^1.0.0",
+    "karma-sauce-launcher": "^4.3.6",
+    "karma-spec-reporter": "^0.0.34",
+    "uglify-es": "^3.3.9"
+  },
+  "bugs": {
+    "url": "https://github.com/stacktracejs/stackframe/issues"
+  },
+  "main": "./stackframe.js",
+  "typings": "./stackframe.d.ts",
+  "files": [
+    "LICENSE",
+    "README.md",
+    "stackframe.js",
+    "stackframe.d.ts",
+    "dist/"
+  ],
+  "scripts": {
+    "lint": "eslint",
+    "test": "karma start karma.conf.js --single-run",
+    "test-pr": "karma start karma.conf.js --single-run --browsers Firefox,Chrome_No_Sandbox",
+    "test-ci": "karma start karma.conf.ci.js --single-run",
+    "prepare": "cp stackframe.js dist/ && uglifyjs stackframe.js -o dist/stackframe.min.js --compress --mangle --source-map \"url=stackframe.min.js.map\""
+  }
+}
Index: frontend/node_modules/stackframe/stackframe.d.ts
===================================================================
--- frontend/node_modules/stackframe/stackframe.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/stackframe/stackframe.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,74 @@
+// Type definitions for StackFrame v1.3
+// Project: https://github.com/stacktracejs/stackframe
+// Definitions by: Eric Wendelin <https://www.eriwen.com>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export as namespace StackFrame;  // global for non-module UMD users
+
+export = StackFrame;
+
+declare namespace StackFrame {
+    export interface StackFrameOptions {
+        isConstructor?: boolean;
+        isEval?: boolean;
+        isNative?: boolean;
+        isToplevel?: boolean;
+        columnNumber?: number;
+        lineNumber?: number;
+        fileName?: string;
+        functionName?: string;
+        source?: string;
+        args?: any[];
+        evalOrigin?: StackFrame;
+    }
+}
+
+declare class StackFrame {
+    constructor(obj: StackFrame.StackFrameOptions);
+
+    args?: any[];
+    getArgs(): any[] | undefined;
+    setArgs(args: any[]): void;
+
+    evalOrigin?: StackFrame;
+    getEvalOrigin(): StackFrame | undefined;
+    setEvalOrigin(stackframe: StackFrame): void;
+
+    isConstructor?: boolean;
+    getIsConstructor(): boolean | undefined;
+    setIsConstructor(isConstructor: boolean): void;
+
+    isEval?: boolean;
+    getIsEval(): boolean | undefined;
+    setIsEval(isEval: boolean): void;
+
+    isNative?: boolean;
+    getIsNative(): boolean | undefined;
+    setIsNative(isNative: boolean): void;
+
+    isToplevel?: boolean;
+    getIsToplevel(): boolean | undefined;
+    setIsToplevel(isToplevel: boolean): void;
+
+    columnNumber?: number;
+    getColumnNumber(): number | undefined;
+    setColumnNumber(columnNumber: number): void;
+
+    lineNumber?: number;
+    getLineNumber(): number | undefined;
+    setLineNumber(lineNumber: number): void;
+
+    fileName?: string;
+    getFileName(): string | undefined;
+    setFileName(fileName: string): void;
+
+    functionName?: string;
+    getFunctionName(): string | undefined;
+    setFunctionName(functionName: string): void;
+
+    source?: string;
+    getSource(): string | undefined;
+    setSource(source: string): void;
+
+    toString(): string;
+}
Index: frontend/node_modules/stackframe/stackframe.js
===================================================================
--- frontend/node_modules/stackframe/stackframe.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/stackframe/stackframe.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,143 @@
+(function(root, factory) {
+    'use strict';
+    // Universal Module Definition (UMD) to support AMD, CommonJS/Node.js, Rhino, and browsers.
+
+    /* istanbul ignore next */
+    if (typeof define === 'function' && define.amd) {
+        define('stackframe', [], factory);
+    } else if (typeof exports === 'object') {
+        module.exports = factory();
+    } else {
+        root.StackFrame = factory();
+    }
+}(this, function() {
+    'use strict';
+    function _isNumber(n) {
+        return !isNaN(parseFloat(n)) && isFinite(n);
+    }
+
+    function _capitalize(str) {
+        return str.charAt(0).toUpperCase() + str.substring(1);
+    }
+
+    function _getter(p) {
+        return function() {
+            return this[p];
+        };
+    }
+
+    var booleanProps = ['isConstructor', 'isEval', 'isNative', 'isToplevel'];
+    var numericProps = ['columnNumber', 'lineNumber'];
+    var stringProps = ['fileName', 'functionName', 'source'];
+    var arrayProps = ['args'];
+    var objectProps = ['evalOrigin'];
+
+    var props = booleanProps.concat(numericProps, stringProps, arrayProps, objectProps);
+
+    function StackFrame(obj) {
+        if (!obj) return;
+        for (var i = 0; i < props.length; i++) {
+            if (obj[props[i]] !== undefined) {
+                this['set' + _capitalize(props[i])](obj[props[i]]);
+            }
+        }
+    }
+
+    StackFrame.prototype = {
+        getArgs: function() {
+            return this.args;
+        },
+        setArgs: function(v) {
+            if (Object.prototype.toString.call(v) !== '[object Array]') {
+                throw new TypeError('Args must be an Array');
+            }
+            this.args = v;
+        },
+
+        getEvalOrigin: function() {
+            return this.evalOrigin;
+        },
+        setEvalOrigin: function(v) {
+            if (v instanceof StackFrame) {
+                this.evalOrigin = v;
+            } else if (v instanceof Object) {
+                this.evalOrigin = new StackFrame(v);
+            } else {
+                throw new TypeError('Eval Origin must be an Object or StackFrame');
+            }
+        },
+
+        toString: function() {
+            var fileName = this.getFileName() || '';
+            var lineNumber = this.getLineNumber() || '';
+            var columnNumber = this.getColumnNumber() || '';
+            var functionName = this.getFunctionName() || '';
+            if (this.getIsEval()) {
+                if (fileName) {
+                    return '[eval] (' + fileName + ':' + lineNumber + ':' + columnNumber + ')';
+                }
+                return '[eval]:' + lineNumber + ':' + columnNumber;
+            }
+            if (functionName) {
+                return functionName + ' (' + fileName + ':' + lineNumber + ':' + columnNumber + ')';
+            }
+            return fileName + ':' + lineNumber + ':' + columnNumber;
+        }
+    };
+
+    StackFrame.fromString = function StackFrame$$fromString(str) {
+        var argsStartIndex = str.indexOf('(');
+        var argsEndIndex = str.lastIndexOf(')');
+
+        var functionName = str.substring(0, argsStartIndex);
+        var args = str.substring(argsStartIndex + 1, argsEndIndex).split(',');
+        var locationString = str.substring(argsEndIndex + 1);
+
+        if (locationString.indexOf('@') === 0) {
+            var parts = /@(.+?)(?::(\d+))?(?::(\d+))?$/.exec(locationString, '');
+            var fileName = parts[1];
+            var lineNumber = parts[2];
+            var columnNumber = parts[3];
+        }
+
+        return new StackFrame({
+            functionName: functionName,
+            args: args || undefined,
+            fileName: fileName,
+            lineNumber: lineNumber || undefined,
+            columnNumber: columnNumber || undefined
+        });
+    };
+
+    for (var i = 0; i < booleanProps.length; i++) {
+        StackFrame.prototype['get' + _capitalize(booleanProps[i])] = _getter(booleanProps[i]);
+        StackFrame.prototype['set' + _capitalize(booleanProps[i])] = (function(p) {
+            return function(v) {
+                this[p] = Boolean(v);
+            };
+        })(booleanProps[i]);
+    }
+
+    for (var j = 0; j < numericProps.length; j++) {
+        StackFrame.prototype['get' + _capitalize(numericProps[j])] = _getter(numericProps[j]);
+        StackFrame.prototype['set' + _capitalize(numericProps[j])] = (function(p) {
+            return function(v) {
+                if (!_isNumber(v)) {
+                    throw new TypeError(p + ' must be a Number');
+                }
+                this[p] = Number(v);
+            };
+        })(numericProps[j]);
+    }
+
+    for (var k = 0; k < stringProps.length; k++) {
+        StackFrame.prototype['get' + _capitalize(stringProps[k])] = _getter(stringProps[k]);
+        StackFrame.prototype['set' + _capitalize(stringProps[k])] = (function(p) {
+            return function(v) {
+                this[p] = String(v);
+            };
+        })(stringProps[k]);
+    }
+
+    return StackFrame;
+}));