chore(package): update tslint to version 4.2.0 (#208)

https://greenkeeper.io/

Author: kamilkisiela

package.json

@@ -60,7 +60,7 @@
     "rimraf": "^2.5.2",
     "rollup": "^0.38.0",
     "rxjs": "5.0.0-rc.4",
-    "tslint": "^4.0.1",
+    "tslint": "^4.2.0",
     "typed-graphql": "^1.0.2",
     "typescript": "~2.0.6",
     "validate-commit-msg": "^2.8.2",