Build(deps-dev): Bump phpstan/phpstan from 0.12.4 to 0.12.5

Bumps [phpstan/phpstan](https://github.com/phpstan/phpstan) from 0.12.4 to 0.12.5.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Commits](phpstan/phpstan@0.12.4...0.12.5)

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

composer.json

@@ -30,7 +30,7 @@
     "ergebnis/test-util": "~0.9.1",
     "jangregor/phpstan-prophecy": "~0.6.0",
     "phpstan/extension-installer": "^1.0.3",
-    "phpstan/phpstan": "~0.12.4",
+    "phpstan/phpstan": "~0.12.5",
     "phpstan/phpstan-deprecation-rules": "~0.12.1",
     "phpstan/phpstan-phpunit": "~0.12.6",
     "phpstan/phpstan-strict-rules": "~0.12.1",