Automated Changelog Entry for 0.3.0a0 on main

Author: github-actions[bot]

CHANGELOG.md

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 <!-- <START NEW CHANGELOG ENTRY> -->
 
+## 0.3.0a0
+
+([Full Changelog](https://github.com/jupyter-server/jupyter_ydoc/compare/v0.2.0...63af4d7c91f1ba101612f0e52c24855a21eafedc))
+
+### Merged PRs
+
+- Add back YMap for cell metadata [#53](https://github.com/jupyter-server/jupyter_ydoc/pull/53) ([@davidbrochart](https://github.com/davidbrochart))
+
+### Contributors to this release
+
+([GitHub contributors page for this release](https://github.com/jupyter-server/jupyter_ydoc/graphs/contributors?from=2022-09-26&to=2022-09-26&type=c))
+
+[@davidbrochart](https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_ydoc+involves%3Adavidbrochart+updated%3A2022-09-26..2022-09-26&type=Issues)
+
+<!-- <END NEW CHANGELOG ENTRY> -->
+
 ## 0.2.0
 
 ([Full Changelog](https://github.com/jupyter-server/jupyter_ydoc/compare/v0.1.17...55dc65afafb669d0a5552e485cf860d402740dc7))
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 [@davidbrochart](https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_ydoc+involves%3Adavidbrochart+updated%3A2022-08-01..2022-09-26&type=Issues) | [@hbcarlos](https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_ydoc+involves%3Ahbcarlos+updated%3A2022-08-01..2022-09-26&type=Issues) | [@pre-commit-ci](https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_ydoc+involves%3Apre-commit-ci+updated%3A2022-08-01..2022-09-26&type=Issues)
 
-<!-- <END NEW CHANGELOG ENTRY> -->
-
 ## 0.1.17
 
 ([Full Changelog](https://github.com/jupyter-server/jupyter_ydoc/compare/v0.1.16...106ee079e2ad9ed7c8b25693932ad921e3ea3e20))