v7.0.0

What's Changed

• upgrade to janephp/open-api 7.6
• drop support for PHP <8.1
• update the SDK based on the latest spec updates - see jolicode/harvest-openapi-generator#28
• switch to Castor for the project tooling

Many thanks to @theteknocat and @finwe for their contribution to the SDK update for recent versions of Symfony.

Full Changelog: v6.3.0...v7.0.0