chore(package): update rimraf to version 2.7.1

Closes #68

Author: greenkeeper[bot]

package.json

@@ -33,7 +33,7 @@
     "ngtemplate-loader": "2.0.1",
     "node-sass": "^4.12.0",
     "resolve-url-loader": "3.1.0",
-    "rimraf": "2.6.3",
+    "rimraf": "2.7.1",
     "sass-loader": "7.1.0",
     "style-loader": "0.23.1",
     "ts-loader": "^6.0.1",