Use PHP 8.4, Add MiddlewareFactory

What's Changed

• Make CI builds passable by @webignition in #136
• Update monolog/monolog by @webignition in #142
• Use phpunit ^11 by @webignition in #145
• Factor out fromJson() methods to factories by @webignition in #147
• Use phpstan ^2.1 by @webignition in #148
• Use phpcs ^4 by @webignition in #149
• Update readme by @webignition in #151
• Use PHP 8.4 by @webignition in #152
• Use phpunit ^12 by @webignition in #143
• Create middleware for container by @webignition in #153

Full Changelog: 3.0...4.0