Update doctrine/coding-standard requirement from ^6.0.0 to ^7.0.2
Update doctrine/coding-standard requirement from ^6.0.0 to ^7.0.2

Updates the requirements on [doctrine/coding-standard](https://github.com/doctrine/coding-standard) to permit the latest version.
- [Release notes](https://github.com/doctrine/coding-standard/releases)
- [Commits](https://github.com/doctrine/coding-standard/compare/6.0.0...7.0.2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Ocramius/StorageLessSession,psr7-sessions/storageless