Bump python-snappy from 0.7.1 to 0.7.2 (#843)

Bumps [python-snappy](https://github.com/intake/python-snappy) from 0.7.1 to 0.7.2.
- [Commits](intake/python-snappy@0.7.1...0.7.2)

---
updated-dependencies:
- dependency-name: python-snappy
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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