composer(deps-dev): update phpstan/phpstan-deprecation-rules requirement

Updates the requirements on [phpstan/phpstan-deprecation-rules](https://github.com/phpstan/phpstan-deprecation-rules) to permit the latest version.

Updates `phpstan/phpstan-deprecation-rules` to 1.2.1
- [Release notes](https://github.com/phpstan/phpstan-deprecation-rules/releases)
- [Commits](phpstan/phpstan-deprecation-rules@1.2.0...1.2.1)

---
updated-dependencies:
- dependency-name: phpstan/phpstan-deprecation-rules
  dependency-type: direct:development
  dependency-group: version-updates
...

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

composer.json

@@ -41,7 +41,7 @@
   "require-dev": {
     "phpstan/extension-installer": "^1.4.3",
     "phpstan/phpstan": "^1.12.3",
-    "phpstan/phpstan-deprecation-rules": "^1.2.0",
+    "phpstan/phpstan-deprecation-rules": "^1.2.1",
     "rector/type-perfect": "^0.2.0",
     "symplify/phpstan-rules": "^13.0.1",
     "tomasvotruba/cognitive-complexity": "^0.2.3",