drag_and_drop_lists

• Add optional feedback widget to items (thanks @svoza10).

Scroll in the correct direction when text is rtl

• Fix scrolling in wrong direction when text direction is right-to-left.
• Fix drag-and-drop feedback widget alignment when text direction is right-to-left.

• DragHandle moved to own widget. To create any drag handle, use the new properties listDragHandle and itemDragHandle in DragAndDropLists.
• Support null safety, see details on migration.

Fix for drag handles and null

• Fix null crash and wrong drag handle used (thanks @vbuberen).

Possibility to contain in ListView, bug fixes

• Bug fix where listDecorationWhileDragging wasn't always being applied.
• Allow DragAndDropLists to be contained in an external ListView when disableScrolling is set to true.

added option to disable scrolling

• Added disableScrolling parameter to DragAndDropLists.

disableScrolling while dragging bug fixed

• Bug fix to also not allow scrolling when disableScrolling is set to true when dragging and dropping items.

Bug fix on disable scrolling for horizontal lists

• Prevent individual lists inside of a horizontal DragAndDropLists from scrolling when disableScrolling is set to true.

Added listDividerOnLastChild to allow disabling last list divider

• Added listDividerOnLastChild parameter to DragAndDropLists. This allows not showing a list divider after the last list (thanks @Zexuz).

• Added onItemDraggingChanged and onListDraggingChanged parameters to DragAndDropLists. This allows certain use cases where it is useful to be notified when dragging starts and ends
• Refactored DragAndDropItemWrapper to accept a DragAndDropBuilderParameters instead of all the other parameters independently to allow for simpler and more consistent changes

• Always check mounted status when setting state

• Added constrainDraggingAxis parameter in DragAndDropLists. This is useful when setting custom drag targets outside of the DragAndDropLists.

• Added drag handle vertical alignment customization. See listDragHandleVerticalAlignment and itemDragHandleVerticalAlignment parameters in DragAndDropLists
• Added mouse cursor change on web when hovering on drag handle
• Fixed itemDecorationWhileDragging only applied when dragHandle is provided? (thanks kjmj)
• Fixed bug where setState() was called after dispose when dragging items in a long list (See issue Error in debug console when dragging item in long list, thanks mivoligo)
• Apply the itemDivider property to items in the DragAndDropListExpansion widget and use the lastItemTargetHeight instead of the constant value of 20 (thanks kjmj)

• Added disableTopAndBottomBorders parameter to DragAndDropListExpansion and ProgrammaticExpansionTile to allow for more styling options.

• Added function parameters for customizing the criteria for where an item or list can be dropped. See the parameters listOnWillAccept, listTargetOnWillAccept, itemOnWillAccept and itemTargetOnWillAccept in DragAndDropLists
• Added function parameters for directly accessing items or lists that have been dropped. See the parameters listOnAccept, listTargetOnAccept, itemOnAccept and itemTargetOnAccept in DragAndDropLists

• Fixed bug where auto scrolling could occur even when not dragging an item (thanks @ElenaKova)

• Added option for drag handles. See dragHandle and dragHandleOnLeft parameters in DragAndDropLists
• Added new example for drag handles
• Added option for item dividers. See the itemDivider parameter in DragAndDropLists
• Added option for inner list box decoration. See the listInnerDecoration parameter in DragAndDropLists
• Added option for decoration while dragging lists and items. See the itemDecorationWhileDragging and itemDecorationWhileDragging parameters in DragAndDropLists
• Removed unused itemDecoration parameter in DragAndDropLists
• Fixed unused itemDraggingWidth parameter in DragAndDropLists
• Configurable bottom padding for list and items. See the lastItemTargetHeight, addLastItemTargetHeightToTop and lastListTargetSize parameters in DragAndDropLists
• Remove pubspec.lock (thanks @freitzzz)

• Added canDrag option for lists
• Interface Change: Any classes implementing DragAndDropListInterface need to add canDrag

• Fixed wrong parameter order for onItemAdd (thanks @khauns)
• ProgrammaticExpansionTile: include option for isThreeLine of ListTile
• ProgrammaticExpansionTile: Remove required annotation for leading

• ProgrammaticExpansionTile: ensure that parent widget will always know its expanded/collapsed state

• Updated example project for web compatibility

• Formatted all with dartfmt

• Added API documentation

• Initial release