Itkwidgets

What's Changed
* Bump itk-vtk-viewer version 14.39.0->14.40.3 by bnmajor in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/652


**Full Changelog**: https://github.com/InsightSoftwareConsortium/itkwidgets/compare/v1.0a30...v1.0a31

What's Changed
* FIX: bump itkwidgets version for ThinPlateSpline notebook by PaulHax in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/646
* FIX: Do not ignore keyword args passed to viewer by bnmajor in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/647
* COMP: Add .readthedocs.yml by thewtex in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/649
* Bump itk-vtk-viewer to 14.39.0 by bnmajor in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/648


**Full Changelog**: https://github.com/InsightSoftwareConsortium/itkwidgets/compare/v1.0a29...v1.0a30

What's Changed
* BLD: bump itk-vtk-viewer to always show compare swap image button by PaulHax in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/645


**Full Changelog**: https://github.com/InsightSoftwareConsortium/itkwidgets/compare/v1.0a28...v1.0a29

What's Changed
* More Compare Methods: cyan-magenta and blend by PaulHax in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/642


**Full Changelog**: https://github.com/InsightSoftwareConsortium/itkwidgets/compare/v1.0a27...v1.0a28

What's Changed
* BLD: Bump itk-vtk-viewer 14.35.0 -> 14.36.0 by bnmajor in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/644


**Full Changelog**: https://github.com/InsightSoftwareConsortium/itkwidgets/compare/v1.0a26...v1.0a27

What's Changed
* ENH: add compareImage to viewer by PaulHax in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/640
* BLD: Bump itk-vtk-viewer 14.35.0 -> 14.35.1 by bnmajor in https://github.com/InsightSoftwareConsortium/itkwidgets/pull/641


**Full Changelog**: https://github.com/InsightSoftwareConsortium/itkwidgets/compare/v1.0a25...v1.0a26