Update phpstan/phpstan requirement from ^0.9 to ^0.11
Update phpstan/phpstan requirement from ^0.9 to ^0.11

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Commits](https://github.com/phpstan/phpstan/compare/0.9...0.11.5)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mimmi20/browscap-json-generator