Bump prosemirror-state from 1.4.3 to 1.4.4

Bumps [prosemirror-state](https://github.com/prosemirror/prosemirror-state) from 1.4.3 to 1.4.4.
- [Changelog](https://github.com/ProseMirror/prosemirror-state/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prosemirror/prosemirror-state/compare/1.4.3...1.4.4

)

---
updated-dependencies:
- dependency-name: prosemirror-state
  dependency-version: 1.4.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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