Bump execa from 1.0.0 to 5.1.1

Bumps [execa](https://github.com/sindresorhus/execa) from 1.0.0 to 5.1.1.
- [Release notes](https://github.com/sindresorhus/execa/releases)
- [Commits](sindresorhus/execa@v1.0.0...v5.1.1)

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

Author: dependabot-preview[bot]