Bump cross-env from 5.1.6 to 5.2.0

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 5.1.6 to 5.2.0.
- [Release notes](https://github.com/kentcdodds/cross-env/releases)
- [Changelog](https://github.com/kentcdodds/cross-env/blob/master/CHANGELOG.md)
- [Commits](kentcdodds/cross-env@v5.1.6...v5.2.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support