Merge pull request #283 from tomyitav/renovate/tslint-5.x

chore(deps): update dependency tslint to v5.20.0

Author: tomyitav

package-lock.json

@@ -137,7 +137,7 @@
     "travis-deploy-once": "5.0.11",
     "ts-jest": "24.0.2",
     "ts-node": "8.3.0",
-    "tslint": "5.18.0",
+    "tslint": "5.20.0",
     "tslint-config-prettier": "1.18.0",
     "tslint-config-standard": "8.0.1",
     "typedoc": "0.15.0",