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

…#99)

Updates the requirements on [phpstan/phpstan-deprecation-rules](https://github.com/phpstan/phpstan-deprecation-rules) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan-deprecation-rules/releases)
- [Commits](phpstan/phpstan-deprecation-rules@0.12.2...0.12.4)

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

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

composer.json

@@ -23,7 +23,7 @@
 		"nette/finder": "~2.5",
 		"nette/neon": "~3.0",
 		"phpstan/phpstan": "0.12.18",
-		"phpstan/phpstan-deprecation-rules": "0.12.2",
+		"phpstan/phpstan-deprecation-rules": "0.12.4",
 		"phpstan/extension-installer": "~1.0",
 		"symfony/config": "~4.4 || ~5.0",
 		"symfony/dependency-injection": "~4.4 || ~5.0",