v4.0.0 - Debugger & Libretro

What's Changed

• Add debugger in #119
• Deprecate unused features in #142
• Add Libretro frontend in #140, #147
• Add the short git commit hash to the version in #148

Emulation improvements and fixes

• Fix HDMA, MBC3 and improve the debugger in #145
• Add CGB Compatability mode for DMG in #146
• Improve compatibility with the CGB bootrom for CGB games in #149

Still in development

• Initial support for RPI baremetal target in #121, #131, #133

Full Changelog: 3.0.2...4.0.0