Bump react-bootstrap from 2.1.0 to 2.7.1

Bumps [react-bootstrap](https://github.com/react-bootstrap/react-bootstrap) from 2.1.0 to 2.7.1.
- [Release notes](https://github.com/react-bootstrap/react-bootstrap/releases)
- [Changelog](https://github.com/react-bootstrap/react-bootstrap/blob/master/CHANGELOG.md)
- [Commits](react-bootstrap/react-bootstrap@v2.1.0...v2.7.1)

---
updated-dependencies:
- dependency-name: react-bootstrap
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]