Fix broken cmake imported target alias#1260

Merged

nlohmann merged 3 commits intonlohmann:developfrom

chuckatkins:fix-cmake-target-alias

Oct 1, 2018

Commits on Sep 30, 2018

cmake: fix package config to deal with versioning and namespaces
Chuck Atkins
committed

Commits on Oct 1, 2018

cmake: add import config tests
Chuck Atkins
committed
docs: add a note in the readme about using the CMake imported target
Chuck Atkins
committed