composer(deps-dev): update phpstan/extension-installer requirement

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

Updates `phpstan/extension-installer` to 1.4.2
- [Release notes](https://github.com/phpstan/extension-installer/releases)
- [Commits](phpstan/extension-installer@1.4.1...1.4.2)

---
updated-dependencies:
- dependency-name: phpstan/extension-installer
  dependency-type: direct:development
  dependency-group: version-updates
...

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

composer.json

@@ -33,7 +33,7 @@
     "infection/infection": "^0.29.0",
     "mimmi20/coding-standard": "^5.2.40",
     "nikic/php-parser": "^4.19.1 || ^5.0.2",
-    "phpstan/extension-installer": "^1.4.1",
+    "phpstan/extension-installer": "^1.4.2",
     "phpstan/phpstan": "^1.11.11",
     "phpstan/phpstan-deprecation-rules": "^1.2.0",
     "phpstan/phpstan-phpunit": "^1.4.0",