v0.6.9

Mostly this release exists to fix imports in Cargo, as well as a few minor bug fixes

What's Changed

• Minor: examples/todomvc - Rename Todos::new() as Todos::default(). by @martinfrances107 in #2390
• Add MessagePack codec by @johnbchron in #2371

New Contributors

• @johnbchron made their first contribution in #2371

Full Changelog: v0.6.8...v0.6.9