v11

Mostly a maintenance release. Changes include:

• Fix uninstallation with newer DKMS versions.
• Bring in the latest changes from the (upstream) Linux kernel, listed below.
• Add support for Trust Flex Design Tablet / UGTizer GT5040, with PID 0x0077. By Martijn van de Streek.
• Add support for Trust Panora (UGEE G5), with VID:PID 145f:0212. By Cristian Klein.
• Add support for XP-Pen Deco L. Thank you, José Expósito!