Merge pull request #100 from holtgrewe/hotfix/razers3_mingw_fix

Making RazerS 3 compile on MinGW.
[FIX] Using CMAKE_FIND_PREFIX_PATH in CMakeLists.txt.

It turns out that one should use CMAKE_FIND_PREFIX_PATH instead of CMAKE_FIND_ROOT_PATH for find_package() to work.
Merge pull request #103 from holtgrewe/hotfix/cmake_find_root_path

Hotfix/cmake find root path