Bump phpstan/phpstan from 1.8.8 to 1.9.7

Bumps [phpstan/phpstan](https://github.com/phpstan/phpstan) from 1.8.8 to 1.9.7.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.9.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.8.8...1.9.7)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

composer.json

@@ -23,7 +23,7 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.13.0",
         "infection/infection": "^0.26.16",
-        "phpstan/phpstan": "^1.9.2",
+        "phpstan/phpstan": "^1.9.7",
         "phpstan/phpstan-strict-rules": "^1.4.4",
         "phpunit/phpunit": "^9.5.27",
         "vimeo/psalm": "^5.1.0"