changed to node lts for travis
changed to node lts for travis

hlmnrmr/liveblog,superdesk/liveblog,hlmnrmr/liveblog,superdesk/liveblog,liveblog/liveblog,liveblog/liveblog,hlmnrmr/liveblog,liveblog/liveblog,superdesk/liveblog,superdesk/liveblog,hlmnrmr/liveblog,liveblog/liveblog,liveblog/liveblog