2.0.21
trivial: Build the URL as required when emulating devices in CI
trivial: Update the plugin README GUID sections to reflect reality
Remove the duplicate (and legally pointless) '(C)' from copyright lines
synaptics-cxaudio: Valdate EEPROM size before trusting it
synaptics-cxaudio: Require minimum 3 bytes before reading device kind signature
Only add the USB subsystem when actually needed
trivial: Make the Rustgen structures more Rust-like
trivial: move plugin-specific tests into their own directory
Allow adding only-quirk instance IDs from quirk files