Capacitive touch sensing + bug fixes
This adds capacitive touch sensing support to Solo if a touch-sensing-capable device is detected. At time of this release, only our "Somu" model supports capacitive touch. More info can be found here: https://www.crowdsupply.com/solokeys/somu
Additionally, a behavior with U2F and user presence (UP) test was improved. Previously, U2F would block on waiting for user presence, and not return a response to the platform until UP was received or timed out. Most platforms expect to get a response immediately and poll until UP is given. U2F was changed to return immediately, which makes better behavior on some platforms.