v1.8.1

This release only contains meaningful changes for the host side. There is no
need to upgrade devices.

• Bug fixes
  • Improved automatic detection of SD Cards on Linux and OSX. This includes
    checks for whether they're writable, removable and non-virtual on Mac so
    that a number of false positive drives can be removed from the list.
  • Remove arbitrary 64 GB max SD card size for automatic detection for OSX and
    Linux. If you have a 128 GB or larger SD Card, you no longer have to force
    it to be selected. The previous change makes this behavior less risky.