v3.21.0 release

New control(s)

• ShareDialog: new control ShareDialog #1897
• Add cs-cz.ts #1932
• FilterBar: new control FilterBar #1884
• Calendar: new controls Calendar #1955

Enhancements

• Update markdown-it to >=13.0.2 #1916
• Dispose of Async instance to prevent memory leak #1936
• DynamicForm: Added support to ModernTaxonomyPicker #1962

Fixes

• ListItemComments: Can't select text from comment #1874
• Localization: Bad translations in DateTimePicker control #1909
• WebPartTitle: Control Fails to Update After Initial Save #1877
• DynamicForm: Creating a document set sometimes throws a 409 save #1919
• ModernTaxonomyPicker: Fix - Adding a new term adds the term to the parentLevel #1922
• ModernTaxonomyPicker: allowMultipleSelections = false, but panel allows multiple items to be selected #1847
• UserPicker: fix exports and add missing link to documentation #1925
• Optimizing ControlsTest webpart in the SPFx source project #1951
• DynamicForm: Not handling mandatory Lookup fields well #1914
• DynamicForm: Loads with Validation Errors if no List Item Id is set #1655
• DynamicForm: required Fields not checked before submit #1953
• DynamicForm: Fix for 1788/1794 and add styles property for support customizing styling #1913
• DynamicForm: Hotfix for 1937 and 1961 #1967
• AdaptiveCardHost: Fix default value for Date.Input #1972

Contributors

Special thanks to our contributors (in alphabetical order): Adam Wójcik, Alessandro Chiavarino, Antanina Druzhkina, brianpmccullough, EnablingLogic, Guido Zambarda, João Mendes, Kevin T. Coughlin, Konrad K., Martin Lingstuyl, Michaël Maillot, Nello D'Andrea, Nishkalank Bezawada, Patrik Hellgren, Petr Malášek, wuxiaojun514.