Add liftoff to package.json.
Add liftoff to package.json.

snogcel/bitcore-node-dash,snogcel/bitcore-node-dash,kleetus/bitcore-node,braydonf/bitcore-node,zcoinrocks/bitcore-node,zcoinrocks/bitcore-node,braydonf/bitcore-node,kleetus/bitcore-node