chore(deps): update dependency tslint to ^5.20.1 (#446)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -63,7 +63,7 @@
     "semantic-release": "^17.3.0",
     "semantic-release-vsce": "^3.0.1",
     "semver": "^5.7.1",
-    "tslint": "^5.4.3",
+    "tslint": "^5.20.1",
     "tslint-config-prettier": "^1.6.0",
     "typescript": "^4.1.3",
     "vsce": "^1.83.0",