Bump @typescript-eslint/eslint-plugin from 4.28.3 to 4.28.4

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 4.28.3 to 4.28.4.
- [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/v4.28.4/packages/eslint-plugin)

---
updated-dependencies:
- dependency-name: "@typescript-eslint/eslint-plugin"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -45,7 +45,7 @@
   "devDependencies": {
     "@types/chai": "^4.2.19",
     "@types/mocha": "^8.2.2",
-    "@typescript-eslint/eslint-plugin": "^4.28.3",
+    "@typescript-eslint/eslint-plugin": "^4.28.4",
     "@typescript-eslint/parser": "^4.28.3",
     "chai": "^4.3.4",
     "eslint": "^7.31.0",