v4.0.0

Full Changelog: v3.0.0...v4.0.0

use &self as parameter in traits
fix panic on to_romaji
add proptests to test against panics

Wana Kana 3.0

What's Changed

• Remove duplicate #[feature(plugin)] by @Bobo1239 in #1
• Handle clippy warnings by @tmfink in #5
• Implement some syntax sugar traits by @TianyiShi2001 in #8
• fix #11 by @JojiiOfficial in #12

New Contributors

• @Bobo1239 made their first contribution in #1
• @tmfink made their first contribution in #5
• @TianyiShi2001 made their first contribution in #8
• @JojiiOfficial made their first contribution in #12

Full Changelog: https://github.com/PSeitz/wana_kana_rust/commits/v3.0.0