chore(package): update tslint-microsoft-contrib to version 6.0.0 (#29)

Author: greenkeeper[bot]

package.json

@@ -90,7 +90,7 @@
     "rimraf": "2.6.2",
     "tslint": "5.11.0",
     "tslint-config-prettier": "1.17.0",
-    "tslint-microsoft-contrib": "5.2.1"
+    "tslint-microsoft-contrib": "6.0.0"
   },
   "lint-staged": {
     "*.ts": [