build(deps-dev): update tslint requirement from ^3.15.1 to ^5.11.0 (#2745)

Updates the requirements on [tslint](https://github.com/palantir/tslint) to permit the latest version.
- [Release notes](https://github.com/palantir/tslint/releases)
- [Changelog](https://github.com/palantir/tslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/palantir/tslint/commits/5.11.0)

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

package.json

@@ -55,7 +55,7 @@
     "discord.js-docgen": "discordjs/docgen",
     "eslint": "^5.0.1",
     "json-filter-loader": "^1.0.0",
-    "tslint": "^3.15.1",
+    "tslint": "^5.11.0",
     "tslint-config-typings": "^0.3.1",
     "typescript": "^3.0.1",
     "uglifyjs-webpack-plugin": "^1.1.8",