Big one: Nutshell 0.16.0 released with a ton of new features!

Feature overview: 

- New binary token format starting with cashuB, saves ~40% space
- Improved offline capabilities and coin selection for wallet
- Ecash fees for mints to protect against abuse and cover operational costs (NUT-02)
- Wallets can stream live updates with websocket subscriptions (NUT-17)
- Multinut payments: pay Lightning invoices from multiple mints (NUT-15)
- Supprt for EUR (currently via Strike only)
- Support for Core Lightning via clnrest.py

https://github.com/cashubtc/nutshell/releases/tag/0.16.0