Bump css-loader from 0.28.9 to 0.28.10 in /www (#860)

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 0.28.9 to 0.28.10.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases/tag/v0.28.10)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v0.28.9...v0.28.10)

www/package.json

@@ -43,7 +43,7 @@
     "copy-webpack-plugin": "^4.4.1",
     "coveralls": "^3.0.0",
     "cross-env": "^5.1.3",
-    "css-loader": "^0.28.9",
+    "css-loader": "^0.28.10",
     "cssnano": "^3.10.0",
     "enzyme": "^3.3.0",
     "enzyme-adapter-react-16": "^1.1.1",

www/yarn.lock

@@ -2179,9 +2179,9 @@ css-color-names@0.0.4:
   version "0.0.4"
   resolved "https://registry.yarnpkg.com/css-color-names/-/css-color-names-0.0.4.tgz#808adc2e79cf84738069b646cb20ec27beb629e0"
 
-css-loader@^0.28.9:
-  version "0.28.9"
-  resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-0.28.9.tgz#68064b85f4e271d7ce4c48a58300928e535d1c95"
+css-loader@^0.28.10:
+  version "0.28.10"
+  resolved "https://registry.yarnpkg.com/css-loader/-/css-loader-0.28.10.tgz#40282e79230f7bcb4e483efa631d670b735ebf42"
   dependencies:
     babel-code-frame "^6.26.0"
     css-selector-tokenizer "^0.7.0"