chore(package): update file-loader to version 5.0.2

Closes #84

Author: greenkeeper[bot]

package.json

@@ -39,7 +39,7 @@
     "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-jsx-a11y": "^5.1.1",
     "eslint-plugin-react": "^7.0.0",
-    "file-loader": "^1.0.0-rc.0",
+    "file-loader": "^5.0.2",
     "jsdom": "^11.0.0",
     "leaflet": "1.0.3",
     "leaflet-draw": "^0.4.9",