* New - Updated admin CSS for new WordPress 5.3 styling.
* Fix - Fixed various issues affecting dynamic metaboxes in the block editor (requires WordPress 5.3)
* Fix - Fixed performance issue when checking network sites for upgrades.
* Fix - Fixed Select2 clones appearing after duplicating a Relationship field.
* Tweak - Repeater field "Add row" icons will now hide when maximum rows are reached.
* Tweak - Removed ACF Blocks keyword limit for later versions of Gutenberg.
* New - Added ACF Blocks feature for ACF PRO.
* Fix - Fixed bug causing duplicate "save metabox" AJAX requests in the Gutenberg editor.
* Fix - Fixed bug causing incorrect Repeater field value order in AJAX requests.
* Dev - Added JS filter `'relationship_ajax_data'` to customize Relationship field AJAX data.
* Dev - Added `$field_group` parameter to `'acf/location/match_rule'` filter.
* Dev - Bumped minimum supported PHP version to 5.4.0.
* Dev - Bumped minimum supported WP version to 4.7.0.
* i18n - Updated German translation thanks to Ralf Koller.
* i18n - Updated Portuguese language thanks to Pedro Mendonça.
* Fix - Added custom metabox location (acf_after_title) compatibility with Gutenberg.
* Fix - Added dynamic metabox check compatibility with Gutenberg.
* Fix - Fixed bug causing required date picker fields to prevent form submit.
* Fix - Fixed bug preventing multi-input values from saving correctly within media modals.
* Fix - Fixed bug where `acf_form()` redirects to an incorrect URL for sub-sites.
* Fix - Fixed bug where breaking out of a sub `have_rows()` loop could produce undesired results.
* Dev - Added filter 'acf/connect_attachment_to_post' to prevent connecting attachments to posts.
* Dev - Added JS filter 'google_map_autocomplete_args' to customize Google Maps autocomplete settings.