Testnet chain upgrade script

[ltfschoen]

$ yarn
$ node chainUpgrade.js           
2021-04-07 14:44:45          API-WS: disconnected from ws://testnet-harbour.datahighway.com: 1006:: connection failed
node:internal/process/promises:227
          triggerUncaughtException(err, true /* fromPromise */);
          ^

[UnhandledPromiseRejection: This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason "#<_Event>".] {
  code: 'ERR_UNHANDLED_REJECTION'
}