Update dependency css-loader to v3.4.2

Author: renovate-bot

package-lock.json

@@ -24,7 +24,7 @@
     "babel-preset-env": "1.7.0",
     "babel-preset-stage-3": "6.24.1",
     "coveralls": "3.0.9",
-    "css-loader": "3.4.1",
+    "css-loader": "3.4.2",
     "cypress": "3.8.1",
     "html-webpack-plugin": "3.2.0",
     "istanbul-instrumenter-loader": "3.0.1",