Release v0.7.0 (#1005)

Update dependencies and get ready to publish version 0.7.0 of Avian :)

Release v0.6.1

Release v0.6.0 (#954)

Bump version numbers and update migration guides in preparation for the
release :)

Bump version numbers to 0.6.0-rc.1

Release v0.5.0

Release v0.4.1

Release v0.4.0 (#864)

Fix collision events not being triggered

Release v0.3.0 (#726)

Update version numbers and dependencies, and do final release prep.

Release 0.2.1