adding cleanslate support for style scoping

package.json

@@ -53,7 +53,9 @@
     "babel-loader": "^7.1.4",
     "babel-preset-airbnb": "^2.4.0",
     "babel-preset-stage-2": "^6.24.1",
+    "clean-webpack-plugin": "^0.1.19",
     "css-loader": "^0.28.11",
+    "cssimportant-loader": "^0.4.0",
     "enzyme": "^3.3.0",
     "enzyme-adapter-react-16": "^1.1.1",
     "enzyme-to-json": "^3.3.4",
@@ -68,6 +70,8 @@
     "jest-cli": "^23.0.1",
     "mini-css-extract-plugin": "^0.4.0",
     "node-sass": "^4.9.0",
+    "postcss-increase-specificity": "^0.6.0",
+    "postcss-loader": "^2.1.5",
     "sass-loader": "^7.0.1",
     "style-loader": "^0.21.0",
     "webpack": "^4.8.3",