build(deps-dev): bump jest from 25.5.4 to 26.6.3 (#171)

Bumps [jest](https://github.com/facebook/jest) from 25.5.4 to 26.6.3.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](jestjs/jest@v25.5.4...v26.6.3)

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Author: dependabot[bot]