Bump the dependencies group with 3 updates

Bumps the dependencies group with 3 updates: [composer/composer](https://github.com/composer/composer), [phpstan/phpstan](https://github.com/phpstan/phpstan) and [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit).


Updates `composer/composer` from 2.5.8 to 2.6.3
- [Release notes](https://github.com/composer/composer/releases)
- [Changelog](https://github.com/composer/composer/blob/main/CHANGELOG.md)
- [Commits](composer/composer@2.5.8...2.6.3)

Updates `phpstan/phpstan` from 1.10.32 to 1.10.34
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.11.x/CHANGELOG.md)
- [Commits](phpstan/phpstan@1.10.32...1.10.34)

Updates `phpunit/phpunit` from 9.6.11 to 9.6.12
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/9.6.12/ChangeLog-9.6.md)
- [Commits](sebastianbergmann/phpunit@9.6.11...9.6.12)

---
updated-dependencies:
- dependency-name: composer/composer
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependencies
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

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

composer.json

@@ -16,7 +16,7 @@
         "ext-json": "*",
         "acquia/drupal-environment-detector": "^1.2.0",
         "bugsnag/bugsnag": "^3.0",
-        "composer/composer": "2.5.8",
+        "composer/composer": "2.6.3",
         "composer/semver": "^3.3",
         "consolidation/self-update": "^2.1.0",
         "cweagans/composer-patches": "^1.7",