2022-03-12: GRUB 2.06 compatibility fix

New binaries with a compatibility fix for GRUB 2.06, for anyone who wants to program a device without compiling the code themselves.

The stm32f103 binary is built targeting the stm32f103c4, so should work on any F103 variant (c4, c6, c8).

2021-05-09: Firmware blobs

Making these binaries available if anyone wants to program a device without compiling the code themselves.

The stm32f103 binary is built targeting the stm32f103c4, so should work on any F103 variant.