chore(package): update rimraf to version 3.0.2

Closes #34

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "istanbul": "^0.4.5",
     "mocha": "^3.0.2",
     "proxyquire": "^1.7.10",
-    "rimraf": "^2.5.4",
+    "rimraf": "^3.0.2",
     "sinon": "^1.17.6",
     "sinon-chai": "^2.8.0"
   }