composer(deps-dev): bump phpstan/phpstan from 0.12.65 to 0.12.66

Bumps [phpstan/phpstan](https://github.com/phpstan/phpstan) from 0.12.65 to 0.12.66.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Commits](phpstan/phpstan@0.12.65...0.12.66)

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

composer.json

@@ -31,7 +31,7 @@
     "ergebnis/phpstan-rules": "~0.15.3",
     "ergebnis/test-util": "^1.4.0",
     "phpstan/extension-installer": "^1.1.0",
-    "phpstan/phpstan": "~0.12.65",
+    "phpstan/phpstan": "~0.12.66",
     "phpstan/phpstan-deprecation-rules": "~0.12.6",
     "phpstan/phpstan-phpunit": "~0.12.17",
     "phpstan/phpstan-strict-rules": "~0.12.7",