v1.2.0

What's Changed

• Add CRC Checking by @JPEWdev in #1
• Force clock to 12.8 MHz or 16.5 MHz when using internal oscillator (fixes clock de-sync issues)
• Optimized internal oscillator calibration routine
• Removed unneeded buffering in code
• Report Software version number in USB descriptor (pyhid-usb-relay can display this)
• Use eeprom_update_block() to change serial. This will eliminate flash wear if you set the serial to the value it already has.

Full Changelog: v1.1.0...v1.2.0