Bump jest from 26.1.0 to 26.2.1

Bumps [jest](https://github.com/facebook/jest) from 26.1.0 to 26.2.1.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](jestjs/jest@v26.1.0...v26.2.1)

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