chore(package): update file-loader to version 5.1.0

Closes #332

Author: greenkeeper[bot]

package.json

@@ -63,7 +63,7 @@
     "eslint-plugin-jest": "^21.7.1",
     "eslint-plugin-react": "^7.0.0",
     "extract-text-webpack-plugin": "^3.0.0",
-    "file-loader": "^1.1.7",
+    "file-loader": "^5.1.0",
     "html-webpack-plugin": "^3.0.0",
     "identity-obj-proxy": "^3.0.0",
     "jest": "^20.0.0",