Merge pull request #16 from Rightech/renovate/clean-webpack-plugin-3.x

Update dependency clean-webpack-plugin to v3

Author: batazor

package-lock.json

@@ -27,7 +27,7 @@
     "@babel/core": "^7.4.5",
     "@babel/preset-env": "^7.4.5",
     "babel-loader": "^8.0.6",
-    "clean-webpack-plugin": "^2.0.2",
+    "clean-webpack-plugin": "^3.0.0",
     "copy-webpack-plugin": "^5.0.3",
     "css-loader": "^2.1.1",
     "grafana-sdk-mocks": "github:grafana/grafana-sdk-mocks",