Bump css-loader from 2.0.2 to 2.1.0 in /apps/updatenotification

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 2.0.2 to 2.1.0.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v2.0.2...v2.1.0)

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

apps/updatenotification/package.json

@@ -32,7 +32,7 @@
     "@babel/core": "^7.2.2",
     "@babel/preset-env": "^7.2.3",
     "babel-loader": "^8.0.4",
-    "css-loader": "^2.0.2",
+    "css-loader": "^2.1.0",
     "file-loader": "^3.0.1",
     "vue-loader": "^15.4.2",
     "vue-template-compiler": "^2.5.21",