Update tomasvotruba/unused-public requirement from ^2.0 to ^2.2 (#197)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.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"