Bump shx from 0.3.3 to 0.3.4

Bumps [shx](https://github.com/shelljs/shx) from 0.3.3 to 0.3.4.
- [Release notes](https://github.com/shelljs/shx/releases)
- [Changelog](https://github.com/shelljs/shx/blob/master/CHANGELOG.md)
- [Commits](shelljs/shx@v0.3.3...v0.3.4)

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

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

Author: dependabot[bot]