The Events Calendar - Virtual Events 1.15.8

* Feature - Include Virtual Events compatibility for the new Tickets Emails feature.
* Tweak - Added filters: `tec_events_virtual_ticket_email_url`
* Tweak - Changed views: `integrations/event-tickets/emails/template-parts/body/virtual-event/link`, `integrations/event-tickets/emails/template-parts/header/head/ve-styles`
* Language - 2 new strings added, 14 updated, 0 fuzzied, and 0 obsoleted

* Version - Virtual Events 1.13.6 is only compatible with The Events Calendar 6.0.10 and higher
* Tweak - PHP version compatibility bumped to PHP 7.4
* Tweak - Version Composer updated to 2
* Tweak - Version Node updated to 18.13.0
* Tweak - Version NPM update to 8.19.3
* Tweak - Reduce JavaScript bundle sizes for Blocks editor

* Version - Virtual Events 1.13.4 is only compatible with The Events Calendar 6.0.7 and higher
* Fix - Numerous issues related to the translation of Views rewrite slugs. [TEC-3733]
* Tweak - Adapt to the change in how we handle view slugs. [TEC-4586]
* Tweak - Added filters: `tribe-events-virtual-widgets-v2-{$view_slug}-should-enqueue-assets`
* Tweak - Removed filters: `tribe-events-virtual-widgets-v2-{$view->get_slug()}-should-enqueue-assets`