chore(package): update rimraf to version 2.7.1

Closes #826

Author: greenkeeper[bot]

package.json

@@ -75,7 +75,7 @@
     "protractor": "5.2.0",
     "raw-loader": "0.5.1",
     "reflect-metadata": "0.1.10",
-    "rimraf": "2.6.2",
+    "rimraf": "2.7.1",
     "tslint": "5.8.0",
     "typedoc": "0.9.0",
     "typescript": "2.6.1",