Bump quantstats from 0.0.62 to 0.0.64

Bumps [quantstats](https://github.com/ranaroussi/quantstats) from 0.0.62 to 0.0.64.
- [Release notes](https://github.com/ranaroussi/quantstats/releases)
- [Changelog](https://github.com/ranaroussi/quantstats/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/ranaroussi/quantstats/commits)

---
updated-dependencies:
- dependency-name: quantstats
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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