add release suffix to doxygen cmake module

CMakeModules/doxygen.cmake

@@ -5,7 +5,7 @@ include(FindDoxygen)
 if(NOT DOXYGEN_FOUND)
   message(STATUS "Doxygen not found.  Contract documentation will not be generated.")
 else()
-  set(DOXY_EOS_VERSION "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}" CACHE INTERNAL "Version string used in PROJECT_NUMBER.")
+  set(DOXY_EOS_VERSION "${VERSION_FULL}" CACHE INTERNAL "Version string used in PROJECT_NUMBER.")
   # CMake strips trailing path separators off of variables it knows are paths,
   # so the trailing '/' Doxygen expects is embedded in the doxyfile.
   set(DOXY_DOC_DEST_DIR "${CMAKE_BINARY_DIR}/docs" CACHE PATH "Path to the doxygen output")