Is your feature request related to a problem? Please describe.
When I go to use CPR I get an error that I'm linking to ZLIB::ZLIB but that target was not found

Proposed solution
I suspect a find_dependency call is missing in cpr's port (it appears the entire install process is added by vcpkg)

Describe alternatives you've considered
Just calling find_package(ZLIB) in my buildsystem (should not be necessary )