Bump smart-open from 6.2.0 to 6.3.0

Bumps [smart-open](https://github.com/piskvorky/smart_open) from 6.2.0 to 6.3.0.
- [Release notes](https://github.com/piskvorky/smart_open/releases)
- [Changelog](https://github.com/RaRe-Technologies/smart_open/blob/develop/CHANGELOG.md)
- [Commits](piskvorky/smart_open@v6.2.0...v6.3.0)

---
updated-dependencies:
- dependency-name: smart-open
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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