New Features
- **flasher_stub**: Increase CPU frequency and write/read speeds over native USB (USB-OTG)
- **flasher_stub**: Increase CPU frequency and write/read speeds over USB-JTAG/Serial
- Readable error message for serial-related issues
- Detect Guru Meditation errors
Bug Fixes
- Add workaround for breaking changes of bitstring==4
- close unused ports while get_default_connected_device