cmake can't find VTK-8.2 because VTKConfig.cmake has moved
8.1 installed it as
/usr/local/lib/cmake/vtk-8.1/VTKConfig.cmake
8.2 installs it now as
/usr/local/lib/vtk-8.2/cmake/vtk-8.2/VTKConfig.cmake
This project https://github.com/open-vv/vv/blob/master/cmake/dependencies.cmake#L16 can't find it now.