Bump ruamel-yaml from 0.17.20 to 0.17.21 (#514)
Bump ruamel-yaml from 0.17.20 to 0.17.21 (#514)

Bumps [ruamel-yaml](https://sourceforge.net/p/ruamel-yaml/code/ci/default/tree) from 0.17.20 to 0.17.21.

---
updated-dependencies:
- dependency-name: ruamel-yaml
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
CellProfiling/cam_acq