chore(package): update tslint-immutable to version 5.1.0

Closes #4

Author: greenkeeper[bot]

package.json

@@ -39,7 +39,7 @@
         "tslint": "~5.11.0",
         "tslint-config-airbnb": "~5.11.0",
         "tslint-config-prettier": "~1.15.0",
-        "tslint-immutable": "~4.9.0",
+        "tslint-immutable": "~5.1.0",
         "tslint-sonarts": "~1.8.0",
         "typescript": "npm:[email protected]"
     },