_ Git - rust-lightning/commit

`Fallback`: add `Address` getter and use bitcoin types

Personal fork of Rust-Lightning. Upstream is https://github.com/rust-bitcoin/rust-lightning

lightning-invoice/Cargo.toml		diff \| blob \| history
lightning-invoice/src/de.rs		diff \| blob \| history
lightning-invoice/src/lib.rs		diff \| blob \| history
lightning-invoice/src/ser.rs		diff \| blob \| history
lightning-invoice/tests/ser_de.rs		diff \| blob \| history