Version 1.5.12 alpha

• lyra2rev2 speed improvements
• support for simultaneous mining and benchmarking
• added support for RTX 2080 in CUDA 10 build
• SLI fix: bus IDs are now mapped to correct UUIDs
• api bumped to 0.1.8

Note on CUDA 10 build:
NVIDIA drivers 411.xx or more recent are required.