Merge pull request #138 from ergebnis/dependabot/composer/phpstan/phpstan-0.12.18

Author: dependabot-preview[bot]

composer.json

@@ -25,7 +25,7 @@
     "ergebnis/phpstan-rules": "~0.14.4",
     "ergebnis/test-util": "~1.0.0",
     "phpstan/extension-installer": "^1.0.3",
-    "phpstan/phpstan": "~0.12.17",
+    "phpstan/phpstan": "~0.12.18",
     "phpstan/phpstan-deprecation-rules": "~0.12.2",
     "phpstan/phpstan-phpunit": "~0.12.6",
     "phpstan/phpstan-strict-rules": "~0.12.2",