Update roave/backward-compatibility-check requirement from ^4.2 to ^4.4
Update roave/backward-compatibility-check requirement from ^4.2 to ^4.4

Updates the requirements on [roave/backward-compatibility-check](https://github.com/Roave/BackwardCompatibilityCheck) to permit the latest version.
- [Release notes](https://github.com/Roave/BackwardCompatibilityCheck/releases)
- [Commits](https://github.com/Roave/BackwardCompatibilityCheck/compare/4.2.0...4.4.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Ocramius/DoctrineBatchUtils