Release 2.0

Updates

• Defaulting to Capsule PSR-17 HTTP factories if none provided
• Cleaning up and optimizing code
• Updating documentation
• Adding test coverage for PHP 8.4
• Bumping dev dependencies

Fixes

• Fixed header name regex matching on responses to include digits and underscore

Breaking changes

• Dropping support for PHP 8.0 and 8.1
• Dropping XmlBody helper
• Dropping SocketHandler