The Events Calendar Pro 6.4.0

* Tweak - Ensure that recurrence rule types use their plural form when appropriate in the Events block

* Fix - Disable recurrence information on tooltips
* Fix - Fallback to default timezone if event timezone is not valid for Countdown Widget

* Feature - added recurring events support to the Events Date Time block
* Feature - added default content support to the Organizer and Venue blocks
* Feature - any configured Additional Field now has a corresponding block in the block editor
* Feature - added option to Additional Fields settings to include configured fields blocks on new events by default
* Tweak - exclusion rules and now called exceptions when configuring recurring events in the block editor
* Fix - Style regression for series end element with gutenberg style override
* Tweak - Changed views: `blocks/additional-fields/checkbox`, `blocks/additional-fields/dropdown`, `blocks/additional-fields/radio`, `blocks/additional-fields/text`, `blocks/additional-fields/textarea`, `blocks/additional-fields/url`
* Language - 2 new strings added, 50 updated, 0 fuzzied, and 0 obsoleted