Bump exr from 1.5.3 to 1.6.3

Bumps [exr](https://github.com/johannesvollmer/exrs) from 1.5.3 to 1.6.3.
- [Release notes](https://github.com/johannesvollmer/exrs/releases)
- [Commits](https://github.com/johannesvollmer/exrs/commits)

---
updated-dependencies:
- dependency-name: exr
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]