4.0.0

PR: #787
Special thanks to Ahmed Nagi.

• Drop Laravel 6 and 7 support.
• Drop PHP 7.x support.
• Add LogOptions configuration object to replace all configuration properties.
• Add ability to batch activity logs #560
• Add Pipeline to customize logged changes data.
  • Deep diff array/JSON sub-keys and respect for only-dirty, no-empty ... #692 using new pipeline. See implementation in the tests.
• Implement a CauserResolver to define causer for current runtime #582.