chore(deps-dev): bump istanbul-badges-readme from 1.2.0 to 1.2.1

Bumps [istanbul-badges-readme](https://github.com/olavoparno/istanbul-badges-readme) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/olavoparno/istanbul-badges-readme/releases)
- [Changelog](https://github.com/olavoparno/istanbul-badges-readme/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/olavoparno/istanbul-badges-readme/compare/v1.2.0...v1.2.1)

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