build(deps-dev): Bump tslint from 5.12.0 to 5.12.1

Bumps [tslint](https://github.com/palantir/tslint) from 5.12.0 to 5.12.1.
- [Release notes](https://github.com/palantir/tslint/releases)
- [Changelog](https://github.com/palantir/tslint/blob/master/CHANGELOG.md)
- [Commits](palantir/tslint@5.12.0...5.12.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -46,7 +46,7 @@
     "semantic-release": "^15.13.2",
     "ts-jest": "^23.10.5",
     "ts-node": "^7.0.1",
-    "tslint": "^5.12.0",
+    "tslint": "^5.12.1",
     "typescript": "^3.2.2"
   },
   "engines": {