Update dependency phpstan/phpstan to v1.9.7 (#1271)

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

Author: renovate[bot]

composer.json

@@ -21,7 +21,7 @@
     "nyholm/psr7": "^1.5",
     "phpbench/phpbench": "^1.2",
     "phpstan/extension-installer": "^1.1",
-    "phpstan/phpstan": "1.9.6",
+    "phpstan/phpstan": "1.9.7",
     "phpstan/phpstan-phpunit": "1.3.3",
     "phpstan/phpstan-strict-rules": "1.4.4",
     "phpunit/phpunit": "^9.5",