Update dependency tslint to v5.11.0 (#22)

Author: renovate[bot]

package-lock.json

@@ -39,7 +39,7 @@
     "rollup": "0.63.4",
     "rollup-plugin-commonjs": "9.1.4",
     "rollup-plugin-node-builtins": "2.1.2",
-    "tslint": "5.10.0",
+    "tslint": "5.11.0",
     "typescript": "2.9.2"
   },
   "lint-staged": {