chore(package): update rimraf to version 2.7.1

Closes #104

Author: greenkeeper[bot]

package.json

@@ -80,7 +80,7 @@
     "karma-jasmine-html-reporter": "0.2.2",
     "karma-mocha-reporter": "2.2.3",
     "protractor": "5.1.2",
-    "rimraf": "2.6.1",
+    "rimraf": "2.7.1",
     "rxjs": "^5.1.0",
     "semantic-release": "6.3.6",
     "ts-node": "3.0.3",