chore(package): update file-loader to version 5.0.1

Closes #145

Author: greenkeeper[bot]

package.json

@@ -74,7 +74,7 @@
     "eslint-plugin-promise": "^4.0.0",
     "eslint-plugin-react": "7.12.4",
     "eslint-plugin-standard": "^4.0.0",
-    "file-loader": "^3.0.1",
+    "file-loader": "^5.0.1",
     "flow-bin": "0.91.0",
     "html-webpack-plugin": "^3.2.0",
     "jest": "23.6.0",