Update phpstan/phpstan requirement from ^1.0 to ^1.8
Update phpstan/phpstan requirement from ^1.0 to ^1.8

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Changelog](https://github.com/phpstan/phpstan/blob/1.8.x/CHANGELOG.md)
- [Commits](https://github.com/phpstan/phpstan/compare/1.0.0...1.8.2)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
web-token/jwt-framework