chore(deps): bump source-map-js in /packages/mpl-codemirror (#124)

Bumps [source-map-js](https://github.com/7rulnik/source-map-js) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/7rulnik/source-map-js/releases)
- [Changelog](https://github.com/7rulnik/source-map-js/blob/main/CHANGELOG.md)
- [Commits](7rulnik/source-map-js@v1.2.1...v1.2.2)

---
updated-dependencies:
- dependency-name: source-map-js
  dependency-version: 1.2.2
  dependency-type: indirect
...

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