build(deps): Bump @stdlib/stats from 0.0.13 to 0.2.1

Bumps [@stdlib/stats](https://github.com/stdlib-js/stats) from 0.0.13 to 0.2.1.
- [Changelog](https://github.com/stdlib-js/stats/blob/main/CHANGELOG.md)
- [Commits](stdlib-js/stats@v0.0.13...v0.2.1)

---
updated-dependencies:
- dependency-name: "@stdlib/stats"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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