chore(deps): update dependency tslint to v6.1.2 (#662)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

Phonebook.Frontend/package-lock.json

@@ -99,7 +99,7 @@
     "semantic-release": "17.0.7",
     "semantic-release-docker-test": "1.0.2",
     "ts-node": "8.9.1",
-    "tslint": "6.1.1",
+    "tslint": "6.1.2",
     "typescript": "3.7.5",
     "webdriver-manager": "12.1.7",
     "webpack-bundle-analyzer": "3.7.0"