Index: frontend/node_modules/throat/index.js
===================================================================
--- frontend/node_modules/throat/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/throat/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,145 @@
+'use strict';
+
+function throatInternal(size) {
+  var queue = new Queue();
+  var s = size | 0;
+
+  function run(fn, self, args) {
+    if ((s | 0) !== 0) {
+      s = (s | 0) - 1;
+      return new Promise(function (resolve) {
+        resolve(fn.apply(self, args));
+      }).then(onFulfill, onReject);
+    }
+    return new Promise(function (resolve) {
+      queue.push(new Delayed(resolve, fn, self, args));
+    }).then(runDelayed);
+  }
+  function runDelayed(d) {
+    try {
+      return Promise.resolve(d.fn.apply(d.self, d.args)).then(
+        onFulfill,
+        onReject
+      );
+    } catch (ex) {
+      onReject(ex);
+    }
+  }
+  function onFulfill(result) {
+    release();
+    return result;
+  }
+  function onReject(error) {
+    release();
+    throw error;
+  }
+  function release() {
+    var next = queue.shift();
+    if (next) {
+      next.resolve(next);
+    } else {
+      s = (s | 0) + 1;
+    }
+  }
+
+  return run;
+}
+
+function earlyBound(size, fn) {
+  const run = throatInternal(size | 0);
+  return function () {
+    var args = new Array(arguments.length);
+    for (var i = 0; i < arguments.length; i++) {
+      args[i] = arguments[i];
+    }
+    return run(fn, this, args);
+  };
+}
+function lateBound(size) {
+  const run = throatInternal(size | 0);
+  return function (fn) {
+    if (typeof fn !== 'function') {
+      throw new TypeError(
+        'Expected throat fn to be a function but got ' + typeof fn
+      );
+    }
+    var args = new Array(arguments.length - 1);
+    for (var i = 1; i < arguments.length; i++) {
+      args[i - 1] = arguments[i];
+    }
+    return run(fn, this, args);
+  };
+}
+module.exports = function throat(size, fn) {
+  if (typeof size === 'function') {
+    var temp = fn;
+    fn = size;
+    size = temp;
+  }
+  if (typeof size !== 'number') {
+    throw new TypeError(
+      'Expected throat size to be a number but got ' + typeof size
+    );
+  }
+  if (fn !== undefined && typeof fn !== 'function') {
+    throw new TypeError(
+      'Expected throat fn to be a function but got ' + typeof fn
+    );
+  }
+  if (typeof fn === 'function') {
+    return earlyBound(size | 0, fn);
+  } else {
+    return lateBound(size | 0);
+  }
+};
+
+module.exports.default = module.exports;
+
+function Delayed(resolve, fn, self, args) {
+  this.resolve = resolve;
+  this.fn = fn;
+  this.self = self || null;
+  this.args = args;
+}
+
+var blockSize = 64;
+function Queue() {
+  this._s1 = [];
+  this._s2 = [];
+  this._shiftBlock = this._pushBlock = new Array(blockSize);
+  this._pushIndex = 0;
+  this._shiftIndex = 0;
+}
+
+Queue.prototype.push = function (value) {
+  if (this._pushIndex === blockSize) {
+    this._pushIndex = 0;
+    this._s1[this._s1.length] = this._pushBlock = new Array(blockSize);
+  }
+  this._pushBlock[this._pushIndex++] = value;
+};
+
+Queue.prototype.shift = function () {
+  if (this._shiftIndex === blockSize) {
+    var s2 = this._s2;
+    if (s2.length === 0) {
+      var s1 = this._s1;
+      if (s1.length === 0) {
+        return undefined;
+      }
+      this._s1 = s2;
+      s2 = this._s2 = s1.reverse();
+    }
+    this._shiftIndex = 0;
+    this._shiftBlock = s2.pop();
+  }
+  if (
+    this._pushBlock === this._shiftBlock &&
+    this._pushIndex === this._shiftIndex
+  ) {
+    return undefined;
+  }
+  var result = this._shiftBlock[this._shiftIndex];
+  this._shiftBlock[this._shiftIndex++] = null;
+  return result;
+};