Merge pull request #236 from xwp/renovate/mini-css-extract-plugin-1.x

Update dependency mini-css-extract-plugin to v1

Author: derekherman

package-lock.json

@@ -74,7 +74,7 @@
     "istanbul-reports": "3.0.2",
     "jest-puppeteer-istanbul": "0.5.3",
     "jest-silent-reporter": "0.2.1",
-    "mini-css-extract-plugin": "0.12.0",
+    "mini-css-extract-plugin": "1.0.0",
     "minimist": "1.2.5",
     "npm-run-all": "4.1.5",
     "null-loader": "4.0.0",