chore(package): update rimraf to version 3.0.1

Closes #28

Author: greenkeeper[bot]

package.json

@@ -53,7 +53,7 @@
     "mocha": "^6.0.0",
     "nyc": "^12.0.2",
     "prettier": "^1.14.0",
-    "rimraf": "^2.6.1"
+    "rimraf": "^3.0.1"
   },
   "dependencies": {}
 }