Bump maggma from 0.29.0 to 0.29.2

Bumps [maggma](https://github.com/materialsproject/maggma) from 0.29.0 to 0.29.2.
- [Release notes](https://github.com/materialsproject/maggma/releases)
- [Changelog](https://github.com/materialsproject/maggma/blob/main/docs/CHANGELOG.md)
- [Commits](materialsproject/maggma@v0.29.0...v0.29.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

requirements.txt

@@ -13,5 +13,5 @@ custodian==2021.2.8
 networkx==2.5.1
 pydash==5.0.0
 pyyaml==5.4.1
-maggma==0.29.0
+maggma==0.29.2
 scikit-image==0.18.1