chore(deps-dev): bump @typescript-eslint/eslint-plugin

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 2.13.0 to 2.15.0.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v2.15.0/packages/eslint-plugin)

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

package.json

@@ -33,7 +33,7 @@
     "eslint-restricted-globals": "^0.2.0"
   },
   "devDependencies": {
-    "@typescript-eslint/eslint-plugin": "2.13.0",
+    "@typescript-eslint/eslint-plugin": "2.15.0",
     "@typescript-eslint/parser": "2.14.0",
     "eslint": "6.8.0",
     "eslint-find-rules": "3.4.0",