AcademySoftwareFoundation/OpenTimelineIO 发布 Beta 14.1 Patch - November 2021

## Summary This release fixes an issue where installation from the sdist (source) package on PyPI would fail. This mostly impacted users with a platform for which we don't provide a prebuilt wheel. ## Changes * Update sdist to include submodules by @JeanChristopheMorinPerso in https://github.com/PixarAnimationStudios/OpenTimelineIO/pull/1156