Merge pull request #25 from 8ui/dependabot/npm_and_yarn/extract-text-…

…webpack-plugin-3.0.2

Update extract-text-webpack-plugin requirement to 3.0.2

package.json

@@ -36,7 +36,7 @@
     "eslint-plugin-promise": "3.5.0",
     "eslint-plugin-react": "6.10.3",
     "eslint-plugin-standard": "2.1.1",
-    "extract-text-webpack-plugin": "2.1.0",
+    "extract-text-webpack-plugin": "3.0.2",
     "file-loader": "1.1.5",
     "html-webpack-plugin": "2.28.0",
     "jest": "19.0.2",