Update file-loader requirement from ^1.1.11 to ^2.0.0 in /{{cookiecutter.app_name}}

Updates the requirements on [file-loader](https://github.com/webpack-contrib/file-loader) to permit the latest version.
- [Release notes](https://github.com/webpack-contrib/file-loader/releases)
- [Changelog](https://github.com/webpack-contrib/file-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/file-loader/commits/v2.0.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

{{cookiecutter.app_name}}/package.json

@@ -36,7 +36,7 @@
     "eslint-config-airbnb-base": "^11.2.0",
     "eslint-plugin-import": "^2.3.0",
     "extract-text-webpack-plugin": "^2.1.2",
-    "file-loader": "^1.1.11",
+    "file-loader": "^2.0.0",
     "font-awesome-webpack": "0.0.5-beta.2",
     "less": "^3.8.0",
     "less-loader": "^4.0.4",