Bump clean-webpack-plugin from 2.0.1 to 3.0.0

Bumps [clean-webpack-plugin](https://github.com/johnagan/clean-webpack-plugin) from 2.0.1 to 3.0.0.
- [Release notes](https://github.com/johnagan/clean-webpack-plugin/releases)
- [Commits](johnagan/clean-webpack-plugin@v2.0.1...v3.0.0)

Author: dependabot-preview[bot]

package-lock.json

@@ -29,7 +29,7 @@
     "babel-preset-env": "^1.7.0",
     "babel-preset-es2015": "^6.24.1",
     "babel-preset-react": "^6.24.1",
-    "clean-webpack-plugin": "^2.0.1",
+    "clean-webpack-plugin": "^3.0.0",
     "cross-env": "^6.0.3",
     "eslint": "^5.16.0",
     "eslint-config-airbnb-base": "^13.2.0",