Update dependency react-scripts to v1.1.5 (mozilla-services#1014)

<p>This Pull Request updates devDependency <code>react-scripts</code> (<a href="https://renovatebot.com/gh/facebookincubator/create-react-app">source</a>) from <code>v1.1.4</code> to <code>v1.1.5</code></p>
<p><details><br />
<summary>Release Notes</summary></p>
<h3 id="v115httpsgithubcomfacebookincubatorcreate-react-appcomparev11496ba7bddc1600d6f5dac9da2418ee69793c22eca"><a href="https://renovatebot.com/gh/facebookincubator/create-react-app/compare/v1.1.4…96ba7bddc1600d6f5dac9da2418ee69793c22eca"><code>v1.1.5</code></a></h3>
<p><a href="https://renovatebot.com/gh/facebookincubator/create-react-app/compare/v1.1.4…96ba7bddc1600d6f5dac9da2418ee69793c22eca">Compare Source</a></p>
<hr />
<p></details></p>
<hr />
<p>This PR has been generated by <a href="https://renovatebot.com">Renovate Bot</a>.</p>

Author: renovate[bot]

frontend/package.json

@@ -17,7 +17,7 @@
   },
   "devDependencies": {
     "prettier": "1.14.2",
-    "react-scripts": "1.1.4"
+    "react-scripts": "1.1.5"
   },
   "scripts": {
     "start": "react-scripts start",