chore(deps-dev): bump mobx from 6.13.5 to 6.13.6 (#262)

Bumps [mobx](https://github.com/mobxjs/mobx) from 6.13.5 to 6.13.6.
- [Release notes](https://github.com/mobxjs/mobx/releases)
- [Commits](https://github.com/mobxjs/mobx/compare/mobx@6.13.5...mobx@6.13.6)

---
updated-dependencies:
- dependency-name: mobx
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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