Disable mirror ranking by default

Fixes for python

V3.9 (#44)

Updated msys2 base to 20210228

Msys2 base update to msys2-base-x86_64-20210215

Missing command

updated readme

Fixed missing new line

Replaced GNU Arm Embedded Toolchain with msys2 arm-none-eabi-gcc

Updated readme

Merge pull request #42 from Gator96100/v3.6

V3.6