Modern Events Calendar - Ticket and Invoice 3.3.0

- compatibility: Modern Events Calendar v6.0.0
- Improved: Resend email notification
- Improved: Addons query for optimization in the backend
- Fixed: Auto-update message
- Fixed: Some minor issues

- compatibility: Modern Events Calendar v5.22.0
- compatibility: MEC WooCommerce Add-On v1.4.3
- Fixed: Duplicated email
- Fixed: Ticket counting
- Fixed: Ticket price in the invoice
- Fixed: Some minor issues