Update phpstan packages (#1223)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

composer.json

@@ -21,9 +21,9 @@
     "nyholm/psr7": "^1.5",
     "phpbench/phpbench": "^1.2",
     "phpstan/extension-installer": "^1.1",
-    "phpstan/phpstan": "1.8.5",
+    "phpstan/phpstan": "1.8.6",
     "phpstan/phpstan-phpunit": "1.1.1",
-    "phpstan/phpstan-strict-rules": "1.4.3",
+    "phpstan/phpstan-strict-rules": "1.4.4",
     "phpunit/phpunit": "^9.5",
     "psalm/plugin-phpunit": "^0.17",
     "psr/http-message": "^1",