v3.0.0-beta.0

• Added Firebird 4.0 Support
• Added Firebird 3.0 Support
• Support for Laravel 8.0+
• Support for PHP 7.4+ and 8.0+
• Added Schema::dropIfExists() support
• Added not between operator
• Added not containing operator
• Added not starting with operator
• Changed package namespace from Firebird\ to HarryGulliford\Firebird\
• Removed Firebird 1.5 support
• Removed version database config option