VDrumExplorer-1.0.0-alpha12: Release 1.0.0-alpha12

Release V-Drum Explorer 1.0.0.0-alpha12

Changes since 1.0.0.0-alpha11:

- Requires .NET 4.8 instead of 4.7.2
- Minor schema fixes (e.g. attack in KitMasterComp)
- Detection of software revisions (module firmware)
- Support for TD-17 and TD-27 version 2 firmware