Release 0.20.0

0.20.0 (2024-12-20)

✨ Features

• Create statically compiled Swift closure wrapper to avoid C-style function pointers (#440) (699e138)

💨 Performance Improvements

• Create PromiseHolder<T> (#439) (00e9db4)
• Mark all types that are used only in std::shared_ptr<T> as SWIFT_NONCOPYABLE (#435) (196fc9d)
• Move more stuff into closures (#434) (745e57e)

🐛 Bug Fixes

• Indent then in nitrogen (#436) (08f3c6c)