Version 0.4.0

Update nuts-rs to version 0.4 and change default number of tuning steps to 300.

What's Changed

• Spelling OCD by @markgoodhead in #9
• Add Cargo.lock to repository by @aseyboldt in #11
• Add option to store unconstrained draws and update stan interface by @aseyboldt in #10
• Update to nuts-rs 0.4 by @aseyboldt in #13
• Bump version to 0.4 by @aseyboldt in #14

New Contributors

• @markgoodhead made their first contribution in #9
• @aseyboldt made their first contribution in #11

Full Changelog: v0.2.1...v0.4.0