Liquid GDK 0.77.7

Release 0.77.7 - 26-07-20

Added

Changed

• Dependencies: Update libwally to 1.5.6, tor to 0.4.9.11
• Dependencies: Update Rust dependency anyhow
• Build: enable OSX and iOS builds to cross compile on arm64 and x86
• 2FA: enforce SMS number format validation to start with '+'

Fixed

• Singlesig: Fix issue when increasing gap limit and dependent transactions were not downloaded for fee calculation