npm(deps): bump @jupyterlab/mainmenu from 3.0.9 to 3.0.10 (#41)

Bumps [@jupyterlab/mainmenu](https://github.com/jupyterlab/jupyterlab) from 3.0.9 to 3.0.10.
- [Release notes](https://github.com/jupyterlab/jupyterlab/releases)
- [Changelog](https://github.com/jupyterlab/jupyterlab/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/[email protected]...@jupyterlab/[email protected])

---
updated-dependencies:
- dependency-name: "@jupyterlab/mainmenu"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]