fix(deps): fix issue where new typescript version was causing errors in the build

Something breaks in version 2.4.1 of typescript. We are pinning to 2.3.0 till those things can be
triaged and fixed

Author: jshcrowthe

yarn-error.log

@@ -0,0 +1,147 @@
+Arguments: 
+  /Users/jshcrowthe/.nvm/versions/node/v6.11.0/bin/node /Users/jshcrowthe/.nvm/versions/node/v6.11.0/bin/yarn
+
+PATH: 
+  /usr/local/git/current/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/Users/jshcrowthe/google-cloud-sdk/bin:/Users/jshcrowthe/.nvm/versions/node/v6.11.0/bin:/Users/jshcrowthe/.bin:/Users/jshcrowthe/.yarn-config/global/node_modules/.bin
+
+Yarn version: 
+  0.27.5
+
+Node version: 
+  6.11.0
+
+Platform: 
+  darwin x64
+
+npm manifest: 
+  {
+    "name": "firebase",
+    "version": "4.1.4",
+    "description": "Firebase JavaScript library for web and Node.js",
+    "author": "Firebase <[email protected]> (https://firebase.google.com/)",
+    "license": "Apache-2.0",
+    "homepage": "https://firebase.google.com/",
+    "keywords": [
+      "authentication",
+      "database",
+      "Firebase",
+      "firebase",
+      "realtime",
+      "storage"
+    ],
+    "repository": {
+      "type": "git",
+      "url": "https://github.com/firebase/firebase-js-sdk.git"
+    },
+    "scripts": {
+      "build": "gulp build",
+      "build:package": "gulp build && cd dist/package && npm install --production && npm shrinkwrap && npm pack && shx mv *.tgz ../",
+      "test": "gulp build && gulp build:tests && gulp test && gulp test:integration",
+      "dev": "gulp dev",
+      "commitmsg": "validate-commit-msg",
+      "precommit": "lint-staged"
+    },
+    "main": "index.js",
+    "devDependencies": {
+      "@types/chai": "^3.4.35",
+      "@types/mocha": "^2.2.39",
+      "@types/node": "^7.0.8",
+      "@types/sinon": "^1.16.35",
+      "awesome-typescript-loader": "^3.2.1",
+      "babel-cli": "^6.23.0",
+      "babel-core": "^6.24.0",
+      "babel-plugin-add-module-exports": "^0.2.1",
+      "babel-plugin-inline-replace-variables": "^1.2.2",
+      "babel-plugin-minify-dead-code-elimination": "^0.1.4",
+      "babel-preset-env": "^1.2.1",
+      "chai": "^3.5.0",
+      "child-process-promise": "^2.2.1",
+      "cross-env": "^5.0.1",
+      "cz-customizable": "^5.0.0",
+      "filesize": "^3.5.6",
+      "git-rev-sync": "^1.9.0",
+      "google-closure-compiler-js": "^20170218.0.0",
+      "gulp": "gulpjs/gulp#4.0",
+      "gulp-babel": "^6.1.2",
+      "gulp-browserify": "^0.5.1",
+      "gulp-clone": "^1.0.0",
+      "gulp-concat": "^2.6.1",
+      "gulp-env": "^0.4.0",
+      "gulp-file": "^0.3.0",
+      "gulp-header": "^1.8.8",
+      "gulp-if": "^2.0.2",
+      "gulp-istanbul": "^1.1.1",
+      "gulp-mocha": "^4.1.0",
+      "gulp-rename": "^1.2.2",
+      "gulp-replace": "^0.5.4",
+      "gulp-sourcemaps": "^2.4.1",
+      "gulp-strip-comments": "^2.4.5",
+      "gulp-typescript": "^3.1.6",
+      "gzip-size": "^3.0.0",
+      "husky": "^0.13.3",
+      "jsdom": "^9.12.0",
+      "karma": "^1.7.0",
+      "karma-chrome-launcher": "^2.0.0",
+      "karma-firefox-launcher": "^1.0.1",
+      "karma-mocha": "^1.3.0",
+      "karma-spec-reporter": "^0.0.30",
+      "karma-typescript": "^3.0.4",
+      "lint-staged": "^4.0.0",
+      "merge2": "^1.0.3",
+      "mkdirp": "^0.5.1",
+      "prettier": "^1.5.1",
+      "require-dir": "^0.3.1",
+      "rimraf": "^2.6.1",
+      "shx": "^0.2.2",
+      "sinon": "^2.1.0",
+      "through2": "^2.0.3",
+  <<<<<<< HEAD
+      "ts-node": "^3.3.0",
+      "typescript": "^2.4.2",
+  =======
+      "ts-loader": "^2.1.0",
+      "ts-node": "2.1.1",
+      "typescript": "2.3.0",
+  >>>>>>> fix(deps): fix issue where new typescript version was causing errors in the build
+      "validate-commit-msg": "^2.12.1",
+      "vinyl-named": "^1.1.0",
+      "webpack": "^3.0.0",
+      "webpack-stream": "^3.2.0",
+      "wrapper-webpack-plugin": "^0.1.11"
+    },
+    "dependencies": {
+      "dom-storage": "^2.0.2",
+      "faye-websocket": "0.9.3",
+      "jsonwebtoken": "^7.3.0",
+      "promise-polyfill": "^6.0.2",
+      "xmlhttprequest": "^1.8.0"
+    },
+    "config": {
+      "commitizen": {
+        "path": "./node_modules/cz-customizable"
+      },
+      "cz-customizable": {
+        "config": "./.cz-config.js"
+      }
+    },
+    "lint-staged": {
+      "**/*.ts": [
+        "prettier --write {src,tests}/**/*.ts",
+        "git add"
+      ]
+    }
+  }
+
+yarn manifest: 
+  No manifest
+
+Lockfile: 
+  No lockfile
+
+Trace: 
+  SyntaxError: /Users/jshcrowthe/Repos/firebase-js-sdk/package.json: Unexpected token < in JSON at position 2526
+      at Object.parse (native)
+      at /Users/jshcrowthe/.nvm/versions/node/v6.11.0/lib/node_modules/yarn/lib/util/fs.js:554:57
+      at next (native)
+      at step (/Users/jshcrowthe/.nvm/versions/node/v6.11.0/lib/node_modules/yarn/node_modules/babel-runtime/helpers/asyncToGenerator.js:17:30)
+      at /Users/jshcrowthe/.nvm/versions/node/v6.11.0/lib/node_modules/yarn/node_modules/babel-runtime/helpers/asyncToGenerator.js:28:13