Chore(deps-dev): Bump tslint from 5.12.1 to 5.20.1 (#1397)

Bumps [tslint](https://github.com/palantir/tslint) from 5.12.1 to 5.20.1.
- [Release notes](https://github.com/palantir/tslint/releases)
- [Changelog](https://github.com/palantir/tslint/blob/master/CHANGELOG.md)
- [Commits](palantir/tslint@5.12.1...5.20.1)

---
updated-dependencies:
- dependency-name: tslint
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -155,7 +155,7 @@
         "tar": "6.1.11",
         "trim-newlines": "4.0.2",
         "ts-jest": "27.0.7",
-        "tslint": "5.12.1",
+        "tslint": "5.20.1",
         "tslint-config-prettier": "1.18.0",
         "tslint-react": "4.0.0",
         "url-parse": "1.5.3",