Bump phpstan/phpstan from 1.11.9 to 1.12.0 in the dev-dependencies group

Bumps the dev-dependencies group with 1 update: [phpstan/phpstan](https://github.com/phpstan/phpstan).


Updates `phpstan/phpstan` from 1.11.9 to 1.12.0
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.12.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.11.9...1.12.0)

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

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

composer.json

@@ -5,7 +5,7 @@
  "require-dev": {
  "glpi-project/tools": "^0.7.3",
  "php-parallel-lint/php-parallel-lint": "^1.4",
- "phpstan/phpstan": "^1.11",
+ "phpstan/phpstan": "^1.12",
  "squizlabs/php_codesniffer": "^3.10"
  },
  "config": {