chore(package): update rimraf to version 3.0.1

Closes #44

Author: greenkeeper[bot]

package.json

@@ -67,7 +67,7 @@
     "mini-css-extract-plugin": "^0.7.0",
     "react": "^16.5.2",
     "react-dom": "^16.5.2",
-    "rimraf": "^2.6.2",
+    "rimraf": "^3.0.1",
     "sass-loader": "^7.1.0",
     "style-loader": "^0.23.1",
     "url-loader": "^1.1.2",