chore(package): update css-loader to version 3.0.0

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "coveralls": "^3.0.3",
-    "css-loader": "^2.1.1",
+    "css-loader": "^3.0.0",
     "jest": "^24.8.0",
     "mini-css-extract-plugin": "^0.7.0",
     "webpack": "^4.31.0",