v0.4.0

What's Changed

✨ Features

• Update to up-spec v1.6.0-alpha.7 by @sophokles73 in #68

🐛 Bug Fixes

• Fix MSRV by @sophokles73 in #70

Other Changes

• Prepare v0.4.0 release by @sophokles73 in #71

Full Changelog: v0.3.0...v0.4.0