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• Support Symfony 7
• Drop support for Symfony < 6.4
• Test with PHP 8.2 and 8.3
• Drop support for PHP < 8.1
• Switched to PSR-17 message factories
• Switched some places to PSR-18 HTTP client. The main functionality needs the Httplug Async Client specification. There is no PSR for asynchronous clients.
• Parameter and return type declarations where possible.
• Ignore empty tag lists passed to TagCapable::invalidateTags so you don't need to check if there are tags or not.

• Avoid deprecated RequestMatcher in favor of IpsRequestMatcher.

• Declare incompatibility with Symfony 7 because it removes RequestMatcher.

• Directly require php-http/message-factory to keep working with the legacy factories.

• Provide a TagHeaderParser that can split up a tag header into the list of tags. This allows to correctly handle non-default tag separators in all places.

• Fixed varnish configuration examples to say Authorization and not Autorization.

• Fixed dummy interface name for code scanners to match the expected name.

Symfony Compatibility

• Removed the internal BaseEvent class and extend our events from the Symfony contracts class directly.
• Made the CacheInvalidation interface compatible with Symfony 6. Symfony 6 does a BC break for HttpKernelInterface::fetch - if you implement the method in your application, you need to adjust when upgrading to Symfony 6.

Symfony Compatibility

• Do not extend the wrong Event class when installed with legacy Symfony but the Symfony contracts happen to be installed

• Allow installation with Symfony 6 components
• Drop support for Symfony 3, minimal version is now 4.3