composer(deps-dev): bump phpstan/phpstan from 0.12.33 to 0.12.40

Bumps [phpstan/phpstan](https://github.com/phpstan/phpstan) from 0.12.33 to 0.12.40.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Commits](phpstan/phpstan@0.12.33...0.12.40)

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

Author: dependabot[bot]

composer.json

@@ -28,7 +28,7 @@
     "infection/infection": "~0.13.6",
     "jangregor/phpstan-prophecy": "~0.8.0",
     "phpstan/extension-installer": "^1.0.4",
-    "phpstan/phpstan": "~0.12.33",
+    "phpstan/phpstan": "~0.12.40",
     "phpstan/phpstan-deprecation-rules": "~0.12.5",
     "phpstan/phpstan-phpunit": "~0.12.16",
     "phpstan/phpstan-strict-rules": "~0.12.4",