We were calling g_module_symbol() 2703 times, which is actually more
expensive than you'd think.
It also means the plugins are actually what we tell people they are:
A set of vfuncs that get run. The reality before that they were dlsym'd
functions that get called at pretty random times.
This plugin supports reading the keyboard firmware version at runtime and
rebooting the keyboard to USB DFU mode. Tested with firmware uploaded to
embargo-system76.
