Eclair v0.9.0: Dual Funding, Splicing Prototype, Bolt 12 & More

- "This release contains a lot of preparatory work for important (and complex) lightning features: dual-funding, splicing and Bolt 12 offers."

- "These features are now fully implemented in eclair, but we're waiting for the specification work to be finalized and other implementations to be ready for cross-compatibility tests."

- "You should only activate them if you know what you're doing, and are ready to handle potential backwards-incompatible changes!"