CMake: switch to using FIND_PACKAGE(OpenCV). OpenCV is deprecating pkg-config support in 4.0, fixes issue #90.
CMake: switch to using FIND_PACKAGE(OpenCV). OpenCV is deprecating pkg-config support in 4.0, fixes issue #90.

inilabs/libcaer,inilabs/libcaer,inilabs/libcaer,inilabs/libcaer