Update file-loader to the latest version 🚀 (#941)

* chore(package): update file-loader to version 3.0.0

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -62,7 +62,7 @@
     "eslint": "^5.0.0",
     "eslint-plugin-jest": "^22.0.0",
     "eslint-plugin-react": "^7.0.1",
-    "file-loader": "^2.0.0",
+    "file-loader": "^3.0.0",
     "history": "^4.7.2",
     "http-server": "~0.11.1",
     "immutable": "~3.8.1",