fix(build): changed library link to public

Author: Sinan-Karakaya

CMakeLists.txt

@@ -17,11 +17,11 @@ include(FetchContent)
 FetchContent_Declare(json URL https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz)
 FetchContent_MakeAvailable(json)
 
-target_link_libraries(cpp-i18n PRIVATE nlohmann_json::nlohmann_json)
+target_link_libraries(cpp-i18n PUBLIC nlohmann_json::nlohmann_json)
 
 # Build tests
 if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
     if (BUILD_TESTING)
         add_subdirectory(tests)
     endif()
-endif()
+endif()