JS OIC spec: rename OicResource::onupdate to onchange
JS OIC spec: rename OicResource::onupdate to onchange

Signed-off-by: Zoltan Kis <a19552f6802a43719fc4b564312fe1b3bb853d9a@intel.com>

zolkis/iotivity-node,zolkis/iotivity-node,zolkis/iotivity-node,zolkis/iotivity-node,zolkis/iotivity-node