Use continuous testing
Closely related to Librem5/librem5-devkit-tools#49
Since this program is supposed to be user-friendly, its recovery methods should be regularly tested against more-or-less up-to-date images pretending to be users' phones needing recovery. That's because the recovery tool can't serve its purpose if we accidentally make a change elsewhere that renders it unoperative (e.g. change the kernel compression method or partition layout).