This commit updates the ZEN configuration to support supernodes.
In addition, to get everything working properly, I had to update all the
packages. This is actually something I was planning on doing anyway
since it seems there are some vulnerabilities with some of these older
packages.
This commit has a sister commit: https://github.com/z-nomp/node-stratum-pool/pull/2
Please note that since this requires an update to node-stratum-pool that you need to `npm upgrade`. Verify that the latest has been pulled down by checking `node_modules/stratum-pool/lib/transactions.js` has `Super Nodes` in it.