Release v0.4.0

What's Changed

• Fix BIGINT precision loss in structured_content JSON serialization by @mixermt in #37
• Add macOS Keychain-backed password lookup by @yakirgb in #39

New Contributors

• @mixermt made their first contribution in #37
• @yakirgb made their first contribution in #39

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