This update for python-usbsdmux fixes the following issues:

- Update to 0.2.1. Main changes:

* cli: Handle well-known Exceptions
* usb2642i2c: Do not create if device node does not exist
* commandline: 'get' must respect hardware signal priority

- Main changes in 0.2.0:

* Remove the service/client split and access /dev/sg* directly
* usb2642i2c: Fix sg device open arguments
* Simplify the read-only to read-write mode transition
* usbsdmux: honor wait argument in mode_disconnect()
* main/service: add get action
* usdbsdmux: set/enable default output values only for writes

- Move udev to a separate package
- Use update-alternatives

- Add udev rule to have /dev/usb-sd-mux/id- links

- Version 0.1.8