Update dependency Gong-wpf-dragdrop to v4

[dependencyupdates]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Gong-wpf-dragdrop	3.2.1 -> 4.0.0

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Release Notes

punker76/gong-wpf-dragdrop (Gong-wpf-dragdrop)

v4.0.0: gong-wpf-dragdrop v4.0.0

Compare Source

As part of this release we had 49 commits which resulted in 13 issues being closed.

Breaking Changes

• !424 Enable custom IDragInfo & IDropInfo implementations
• !476 Remove .NET Core 3.1 support
• !505 Typo Detatch -> Detach in DropTargetAdorner corrected
• !506 Set target to net462, net6 and net8

Bug

• #​493 Drag adorner freezes on screen after middle mouse button is pressed

Bug Fixs

• !497 Always correctly reset state when drag is cancelled
• !498 Check for IsHitTestVisible during hit tests
• !502 Threading Problem

Enhancements

• !453 Add logic to disallow child items in tree views
• !486 * Use MultiSelector's UnselectAll() method instead of iterating over …

Feature

• !489 DropTarget hint and DropHighlightAdorner background brush

Feature Requests

• #​487 [New Feature] Drop target hints
• #​488 [New Feature] Change brush for highlight adorner

Where to get it

You can download this release from gong-wpf-dragdrop

New Contributors

• @​BerndHaidan made their first contribution in #​486
• @​VacuumBreather made their first contribution in #​497
• @​softwaretirol made their first contribution in #​502
• @​mangoyoga80 made their first contribution in #​489

Full Changelog: punker76/gong-wpf-dragdrop@3.2.1...4.0.0

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