Bump libs/opentimelineio from 4b3b673 to 5184c36 (#71)

Bumps [libs/opentimelineio](https://github.com/AcademySoftwareFoundation/OpenTimelineIO) from `4b3b673` to `5184c36`.
- [Release notes](https://github.com/AcademySoftwareFoundation/OpenTimelineIO/releases)
- [Commits](AcademySoftwareFoundation/OpenTimelineIO@4b3b673...5184c36)

---
updated-dependencies:
- dependency-name: libs/opentimelineio
  dependency-type: direct:production
...

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