adjust the case for shell32 inclusion (#1347)

Fixes #1346

Author: phlptp

src/CMakeLists.txt

@@ -51,7 +51,7 @@ if(CMAKE_CXX_STANDARD LESS 14)
 endif()
 
 if(WIN32)
-  target_link_libraries(CLI11 ${PUBLIC_OR_INTERFACE} Shell32)
+  target_link_libraries(CLI11 ${PUBLIC_OR_INTERFACE} shell32)
 endif()
 
 if(CLI11_INSTALL OR CLI11_FULL_INSTALL)

tests/CMakeLists.txt

@@ -163,7 +163,7 @@ function(add_dependent_application_definitions TARGET)
                                PRIVATE CLI11_${APP_UPPERCASE}_EXE="$<TARGET_FILE:${APP}>")
 
     if(WIN32)
-      target_link_libraries(${APP} PRIVATE Shell32)
+      target_link_libraries(${APP} PRIVATE shell32)
     endif()
   endforeach()
 endfunction()