The Events Calendar - Event Tickets Plus 6.1.0

* Version - Event Tickets Plus 6.1.0 is only compatible with Event Tickets 5.16.0 or higher.
* Feature - Added integration with new premium Seating product for Event Tickets.
* Tweak - Added filters: `tribe_tickets_plus_ticket_is_unlimited`, `tec_tickets_ar_modal_arguments`, `tec_tickets_ar_modal_id`
* Tweak - Changed views: `v2/attendee-registration/content/attendees/fields`, `v2/modal/cart`, `v2/tickets/submit/button-modal`
* Language - 0 new strings added, 0 updated, 1 fuzzied, and 0 obsoleted

* Feature - Include alternate ticket providers into new Tickets Home page. [ET-2173]
* Fix - Add Event Tickets Plus meta during ticket duplication [ECP-1826].
* Fix - Load the full Payment Element if we have Wallets enabled. [ETP-942]
* Fix - Change the meta_value from %d to %s, saving SQL from needing to cast the value to evaluate it. [GTRIA-1236]
* Language - 0 new strings added, 23 updated, 0 fuzzied, and 0 obsoleted

* Fix - Load the full Payment Element if we have Wallets enabled. [ETP-942]
* Fix - Change the meta_value from %d to %s, saving SQL from needing to cast the value to evaluate it. [GTRIA-1236]
* Language - 0 new strings added, 0 updated, 0 fuzzied, and 0 obsoleted