chore(React 16): switch ReactDOM.render to ReactDOM.hydrate
chore(React 16): switch ReactDOM.render to ReactDOM.hydrate

mozilla/activity-stream,AdamHillier/activity-stream,rlr/activity-streams,mozilla/activity-stream,mozilla/activity-stream,AdamHillier/activity-stream,AdamHillier/activity-stream,Mardak/activity-stream,AdamHillier/activity-stream,sarracini/activity-stream,sarracini/activity-stream,mozilla/activity-streams,rlr/activity-streams,rlr/activity-streams,sarracini/activity-stream,rlr/activity-streams,mozilla/activity-streams,mozilla/activity-stream,Mardak/activity-stream,Mardak/activity-stream,Mardak/activity-stream,sarracini/activity-stream