For those needing node 9.x+ support

See here: https://www.npmjs.com/package/node-memwatch a fork that handles 9.x+. I don't see it referred to here and a lot of Q's about newer versions of node.

@marcominetti - if I made a PR to merge 9.x+ support into this repo would you be amenable to merging? Also would be happy to merge myself if you'd rather share access.

Thanks