chore(package): update rimraf to version 3.0.1

Closes #30

Author: greenkeeper[bot]

package.json

@@ -85,7 +85,7 @@
         "prettier": "^1.16.4",
         "publish-please": "^5.4.3",
         "remap-istanbul": "^0.13.0",
-        "rimraf": "^2.6.3",
+        "rimraf": "^3.0.1",
         "sinon": "^7.3.1",
         "sinon-chai": "^3.3.0",
         "ts-loader": "^5.3.3",