message: template: fix VERSION/SOVERSION
diff: @@ -9,6 +9,8 @@ target_link_libraries(mavsdk_{{ plugin_name.lower_snake_case }}
  set_target_properties(mavsdk_{{ plugin_name.lower_snake_case }}
  PROPERTIES COMPILE_FLAGS ${warnings}
  + VERSION ${MAVSDK_VERSION_STRING}
  + SOVERSION ${MAVSDK_SOVERSION_STRING}
  )
  target_include_directories(mavsdk_{{ plugin_name.lower_snake_case }} PUBLIC
  