Update @typescript-eslint/eslint-plugin requirement

Updates the requirements on [@typescript-eslint/eslint-plugin](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/eslint-plugin) to permit the latest version.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v6.20.0/packages/eslint-plugin)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -41,7 +41,7 @@
     "@types/proxyquire": "^1.3.31",
     "@types/sinon": "^17.0.3",
     "@types/sinon-chai": "^3.2.12",
-    "@typescript-eslint/eslint-plugin": "^6.19.1",
+    "@typescript-eslint/eslint-plugin": "^6.20.0",
     "@typescript-eslint/parser": "^6.19.1",
     "axios-mock-adapter": "^1.22.0",
     "chai": "^4.4.1",