Advanced Varnish cache 4.1.0 Adds Drupal 12 support and converts the hook implementations to the current core APIs. No backwards compatibility breaks. - Drupal 12 support, verified on Drupal 10.6.15, 11.4.5 and 12.0-dev. - Hooks converted to object oriented hook classes, procedural implementations kept behind #[LegacyHook]. - hook_requirements() converted to hook_runtime_requirements(), the procedural version marked #[LegacyRequirementsHook]. Without this the BigPipe conflict check would stop working in Drupal 13. - REQUIREMENT_ERROR replaced with RequirementSeverity::Error through DeprecationHelper. - Minimum core version raised to Drupal 10.1. Only unsupported core versions were dropped: Drupal 9 and Drupal 10.0. - Fixed a deprecation emitted on every request on Drupal 10.3 to 10.6, caused by the wrong version boundary when calling the parent constructor of FinishResponseSubscriber. - Fixed Guzzle 7.11 exceptions for Varnish server addresses configured without a scheme. No public method signature changed: the Drupal 12 return type deprecations are suppressed with @return annotations, so subclasses keep working.