Transition - Transitions now have intervalto allow grouped elements to animate one by one with a delay between each animation. Grouped animations determine order based on transition direction to avoid reflows, or can manually be reversed by using reverse: true See Examples for more details.
Critical Fixes
Transition - Webkit failSafe used for Chromium Bug #437860 now also works for queued animations
Enhancements
Form Validation - Adds containsExactly, notExactly, isExactly case sensitive validation rules, make contains, not, is case insensitive.
Form Validation - contains rule is now case insensitive
Form Validation - Validation messages no longer increase field>inline fields like checkboxes after error appears
API - Added was cancelled to determine whether request was cancelled by beforeSend
*Image - Added hidden image state
Fixes
Build Tools - Fixed issue with recursive merge for site themes in update scripts, details here Thanks @derekslife
Cards - Fix .ui.cards > .ui.card margins to match .ui.cards > .card margins
Cards - Fix consecutive card groups to preserve row flow (similar to consecutive grids)
Sidebar - Sidebar using exclusive: true now queue animations after hiding previous sidebar (unless overlay) to avoid rendering issues
State - Text states now handle cancelled API requests correctly
Search - Category search no longer displays unnecessary error message about maxResults
Composer - Composer.json should now read version from tags, adjusted some fields.
Grid - Stackable grid now has horizontal padding by default on mobile unless nested inside a ui grid or ui segment (not vertical)
Menu - Fixes pointing menu displaying under dropdown menu
Docs
-Transition - useFailSafe was incorrectly shown as false by default