* Add integration test for blendshape sync
* fix: blendshape sync not being processed
This change refactors AnimationDatabase to be part of the same extension
context as the TrackObjectRenames functionality (which is renamed back to
PathMappings). This then allows us to sequence deactivation of this context
to come after blendshape processing completes.
Fixes: #461
* fix: retarget is not performed if rootBone is the only bone to be retargeted
* fix: MeshRetargeter may cause NRE if mesh is null
* fix: MeshRetargeter is not working if sharedMesh is null
* test: add test case for SkinnedMeshRenderer only with rootBone
* test: fix RootBoneOnly test
* test: fix expected and actual
* test: add test for SkinnedMeshRenderer without mesh