v0.21.1

What's Changed

• update pytket version to 2.x by @cqc-melf in #202
• Bump pyqir from 0.10.6 to 0.10.7 in the python-packages group by @dependabot in #203
• release 0.22.0 by @cqc-melf in #204

Full Changelog: v0.21.0...v0.21.1