Missing includes for nlohmann_json

[jfpanisset]

In a build environment where the nlohmann_json header only library is installed outside of /usr/include or /usr/local/include (for instance when building with Conan), the headers cannot be found since the dependency is not specified in CMakeLists.txt.

I believe the following patch against 2.0.0 addresses this. Let me know if I should submit a PR or if you just want to grab the code from here.

diff --git src/rawtoaces_core/CMakeLists.txt src/rawtoaces_core/CMakeLists.txt
index d99dd79ac..bfda2778a 100644
--- src/rawtoaces_core/CMakeLists.txt
+++ src/rawtoaces_core/CMakeLists.txt
@@ -26,6 +26,8 @@
     ${RAWTOACES_CORE_LIB}
     PUBLIC
         Eigen3::Eigen
+    PRIVATE
+        nlohmann_json::nlohmann_json
 )

 if ( ${Ceres_VERSION_MAJOR} GREATER 1 )
diff --git tests/CMakeLists.txt tests/CMakeLists.txt
index d99dd79ac..bfda2778a 100644
--- tests/CMakeLists.txt
+++ tests/CMakeLists.txt
@@ -197,6 +197,8 @@
     PUBLIC
         ${RAWTOACES_UTIL_LIB}
         OpenImageIO::OpenImageIO
+    PRIVATE
+        nlohmann_json::nlohmann_json
 )

 setup_test_coverage(Test_ImageConverter)

[antond-weta]

I have added the missing dependencies here #253