v0.7.0

What's Changed

• Add doc root type iterator by @davidbrochart in https://github.com/davidbrochart/pycrdt/pull/39
• Update to Yrs 0.17.2 by @davidbrochart in https://github.com/davidbrochart/pycrdt/pull/41

Full Changelog: davidbrochart/pycrdt@v0.6.1...v0.7.0