chore(deps): bump shelljs and commitizen

Removes [shelljs](https://github.com/shelljs/shelljs). It's no longer used after updating ancestor dependency [commitizen](https://github.com/commitizen/cz-cli). These dependencies need to be updated together.


Removes `shelljs`

Updates `commitizen` from 4.0.3 to 4.3.0
- [Release notes](https://github.com/commitizen/cz-cli/releases)
- [Commits](commitizen/cz-cli@v4.0.3...v4.3.0)

---
updated-dependencies:
- dependency-name: shelljs
  dependency-type: indirect
- dependency-name: commitizen
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>