Bump @typescript-eslint/eslint-plugin in /Rnwood.Smtp4dev/ClientApp

Bumps [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) from 4.28.5 to 4.29.0.
- [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/v4.29.0/packages/eslint-plugin)

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

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

Rnwood.Smtp4dev/ClientApp/package.json

@@ -14,7 +14,7 @@
   "devDependencies": {
     "@aspnet/signalr": "^1.0.27",
     "@fortawesome/fontawesome-free": "^5.15.3",
-    "@typescript-eslint/eslint-plugin": "^4.28.5",
+    "@typescript-eslint/eslint-plugin": "^4.29.0",
     "@typescript-eslint/parser": "^4.23.0",
     "@vue/cli-plugin-babel": "^4.5.13",
     "@vue/cli-plugin-eslint": "^4.5.13",