Bump react-timekeeper from 2.1.3 to 2.2.1 in /static

Bumps [react-timekeeper](https://github.com/catc/react-timekeeper) from 2.1.3 to 2.2.1.
- [Release notes](https://github.com/catc/react-timekeeper/releases)
- [Commits](https://github.com/catc/react-timekeeper/commits/v2.2.1)

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

Signed-off-by: dependabot[bot] <[email protected]>