Index: trip-planner-front/node_modules/y18n/build/lib/cjs.js
===================================================================
--- trip-planner-front/node_modules/y18n/build/lib/cjs.js	(revision 6a3a178323fd905112b5392bd9d3cb83b66ef2d3)
+++ trip-planner-front/node_modules/y18n/build/lib/cjs.js	(revision 6a3a178323fd905112b5392bd9d3cb83b66ef2d3)
@@ -0,0 +1,6 @@
+import { y18n as _y18n } from './index.js';
+import nodePlatformShim from './platform-shims/node.js';
+const y18n = (opts) => {
+    return _y18n(opts, nodePlatformShim);
+};
+export default y18n;
Index: trip-planner-front/node_modules/y18n/build/lib/index.js
===================================================================
--- trip-planner-front/node_modules/y18n/build/lib/index.js	(revision 6a3a178323fd905112b5392bd9d3cb83b66ef2d3)
+++ trip-planner-front/node_modules/y18n/build/lib/index.js	(revision 6a3a178323fd905112b5392bd9d3cb83b66ef2d3)
@@ -0,0 +1,174 @@
+let shim;
+class Y18N {
+    constructor(opts) {
+        // configurable options.
+        opts = opts || {};
+        this.directory = opts.directory || './locales';
+        this.updateFiles = typeof opts.updateFiles === 'boolean' ? opts.updateFiles : true;
+        this.locale = opts.locale || 'en';
+        this.fallbackToLanguage = typeof opts.fallbackToLanguage === 'boolean' ? opts.fallbackToLanguage : true;
+        // internal stuff.
+        this.cache = Object.create(null);
+        this.writeQueue = [];
+    }
+    __(...args) {
+        if (typeof arguments[0] !== 'string') {
+            return this._taggedLiteral(arguments[0], ...arguments);
+        }
+        const str = args.shift();
+        let cb = function () { }; // start with noop.
+        if (typeof args[args.length - 1] === 'function')
+            cb = args.pop();
+        cb = cb || function () { }; // noop.
+        if (!this.cache[this.locale])
+            this._readLocaleFile();
+        // we've observed a new string, update the language file.
+        if (!this.cache[this.locale][str] && this.updateFiles) {
+            this.cache[this.locale][str] = str;
+            // include the current directory and locale,
+            // since these values could change before the
+            // write is performed.
+            this._enqueueWrite({
+                directory: this.directory,
+                locale: this.locale,
+                cb
+            });
+        }
+        else {
+            cb();
+        }
+        return shim.format.apply(shim.format, [this.cache[this.locale][str] || str].concat(args));
+    }
+    __n() {
+        const args = Array.prototype.slice.call(arguments);
+        const singular = args.shift();
+        const plural = args.shift();
+        const quantity = args.shift();
+        let cb = function () { }; // start with noop.
+        if (typeof args[args.length - 1] === 'function')
+            cb = args.pop();
+        if (!this.cache[this.locale])
+            this._readLocaleFile();
+        let str = quantity === 1 ? singular : plural;
+        if (this.cache[this.locale][singular]) {
+            const entry = this.cache[this.locale][singular];
+            str = entry[quantity === 1 ? 'one' : 'other'];
+        }
+        // we've observed a new string, update the language file.
+        if (!this.cache[this.locale][singular] && this.updateFiles) {
+            this.cache[this.locale][singular] = {
+                one: singular,
+                other: plural
+            };
+            // include the current directory and locale,
+            // since these values could change before the
+            // write is performed.
+            this._enqueueWrite({
+                directory: this.directory,
+                locale: this.locale,
+                cb
+            });
+        }
+        else {
+            cb();
+        }
+        // if a %d placeholder is provided, add quantity
+        // to the arguments expanded by util.format.
+        const values = [str];
+        if (~str.indexOf('%d'))
+            values.push(quantity);
+        return shim.format.apply(shim.format, values.concat(args));
+    }
+    setLocale(locale) {
+        this.locale = locale;
+    }
+    getLocale() {
+        return this.locale;
+    }
+    updateLocale(obj) {
+        if (!this.cache[this.locale])
+            this._readLocaleFile();
+        for (const key in obj) {
+            if (Object.prototype.hasOwnProperty.call(obj, key)) {
+                this.cache[this.locale][key] = obj[key];
+            }
+        }
+    }
+    _taggedLiteral(parts, ...args) {
+        let str = '';
+        parts.forEach(function (part, i) {
+            const arg = args[i + 1];
+            str += part;
+            if (typeof arg !== 'undefined') {
+                str += '%s';
+            }
+        });
+        return this.__.apply(this, [str].concat([].slice.call(args, 1)));
+    }
+    _enqueueWrite(work) {
+        this.writeQueue.push(work);
+        if (this.writeQueue.length === 1)
+            this._processWriteQueue();
+    }
+    _processWriteQueue() {
+        const _this = this;
+        const work = this.writeQueue[0];
+        // destructure the enqueued work.
+        const directory = work.directory;
+        const locale = work.locale;
+        const cb = work.cb;
+        const languageFile = this._resolveLocaleFile(directory, locale);
+        const serializedLocale = JSON.stringify(this.cache[locale], null, 2);
+        shim.fs.writeFile(languageFile, serializedLocale, 'utf-8', function (err) {
+            _this.writeQueue.shift();
+            if (_this.writeQueue.length > 0)
+                _this._processWriteQueue();
+            cb(err);
+        });
+    }
+    _readLocaleFile() {
+        let localeLookup = {};
+        const languageFile = this._resolveLocaleFile(this.directory, this.locale);
+        try {
+            // When using a bundler such as webpack, readFileSync may not be defined:
+            if (shim.fs.readFileSync) {
+                localeLookup = JSON.parse(shim.fs.readFileSync(languageFile, 'utf-8'));
+            }
+        }
+        catch (err) {
+            if (err instanceof SyntaxError) {
+                err.message = 'syntax error in ' + languageFile;
+            }
+            if (err.code === 'ENOENT')
+                localeLookup = {};
+            else
+                throw err;
+        }
+        this.cache[this.locale] = localeLookup;
+    }
+    _resolveLocaleFile(directory, locale) {
+        let file = shim.resolve(directory, './', locale + '.json');
+        if (this.fallbackToLanguage && !this._fileExistsSync(file) && ~locale.lastIndexOf('_')) {
+            // attempt fallback to language only
+            const languageFile = shim.resolve(directory, './', locale.split('_')[0] + '.json');
+            if (this._fileExistsSync(languageFile))
+                file = languageFile;
+        }
+        return file;
+    }
+    _fileExistsSync(file) {
+        return shim.exists(file);
+    }
+}
+export function y18n(opts, _shim) {
+    shim = _shim;
+    const y18n = new Y18N(opts);
+    return {
+        __: y18n.__.bind(y18n),
+        __n: y18n.__n.bind(y18n),
+        setLocale: y18n.setLocale.bind(y18n),
+        getLocale: y18n.getLocale.bind(y18n),
+        updateLocale: y18n.updateLocale.bind(y18n),
+        locale: y18n.locale
+    };
+}
Index: trip-planner-front/node_modules/y18n/build/lib/platform-shims/node.js
===================================================================
--- trip-planner-front/node_modules/y18n/build/lib/platform-shims/node.js	(revision 6a3a178323fd905112b5392bd9d3cb83b66ef2d3)
+++ trip-planner-front/node_modules/y18n/build/lib/platform-shims/node.js	(revision 6a3a178323fd905112b5392bd9d3cb83b66ef2d3)
@@ -0,0 +1,19 @@
+import { readFileSync, statSync, writeFile } from 'fs';
+import { format } from 'util';
+import { resolve } from 'path';
+export default {
+    fs: {
+        readFileSync,
+        writeFile
+    },
+    format,
+    resolve,
+    exists: (file) => {
+        try {
+            return statSync(file).isFile();
+        }
+        catch (err) {
+            return false;
+        }
+    }
+};
