bugfix (#42)

cmake/CPM.cmake

@@ -33,7 +33,7 @@ if(CPM_DIRECTORY)
   endif()
 endif()
 
-set(CPM_VERSION 0.7 CACHE INTERNAL "")
+set(CPM_VERSION 0.7.1 CACHE INTERNAL "")
 
 set(CPM_DIRECTORY ${CMAKE_CURRENT_LIST_DIR} CACHE INTERNAL "")
 set(CPM_PACKAGES "" CACHE INTERNAL "")
@@ -49,6 +49,7 @@ if(NOT CPM_INDENT)
 endif()
 
 function(CPMRegisterPackage PACKAGE VERSION)
+  list(APPEND CPM_PACKAGES ${PACKAGE})
   set(CPM_PACKAGES ${CPM_PACKAGES} CACHE INTERNAL "")
   set("CPM_PACKAGE_${PACKAGE}_VERSION" ${VERSION} CACHE INTERNAL "")
 endfunction()