6.0
Updated build tools:
- MinGW GCC 10.2.0-5
- MinGW GNU binutils 2.35.1-2
- MinGW lld 11.0.0-3
- MSYS2 GNU make 4.3-1
- mame-essentials 1.0.6-1
Base directory as packaged is C:\Users\Public\msys64
so as not to encourage littering the root of the boot drive which is protected by UAC by default.