Update tomasvotruba/unused-public requirement from ^2.0 to ^2.2

Updates the requirements on [tomasvotruba/unused-public](https://github.com/TomasVotruba/unused-public) to permit the latest version.
- [Commits](TomasVotruba/unused-public@2.0.0...2.2.0)

---
updated-dependencies:
- dependency-name: tomasvotruba/unused-public
  dependency-version: 2.2.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

composer.json

@@ -23,7 +23,7 @@
         "symfony/var-dumper": "^5.3",
         "tomasvotruba/cognitive-complexity": "^1",
         "tomasvotruba/type-coverage": "^2.0",
-        "tomasvotruba/unused-public": "^2.0"
+        "tomasvotruba/unused-public": "^2.2"
     },
     "conflict": {
         "tomasvotruba/type-coverage": "<1.0"