Fixing recent instabiliy - error code 520

[finnbear]

The bot has been crashing every few weeks due to an API error. I have updated the dependencies in the deployment, and will see if that helps at all.

› Will update manually added bill 1334141.
› Will update manually added bill 1344932.
› Will get bill details this time.
› Will ignore bill 1345998.
events.js:305
    throw err; // Unhandled 'error' event
    ^

Error [ERR_UNHANDLED_ERROR]: Unhandled error. (ErrorEvent {
  target: WebSocket {
    _events: [Object: null prototype] {
      message: [Function],
      open: [Function],
      error: [Function],
      close: [Function]
    },
    _eventsCount: 4

...

type: 'error',
  message: 'Unexpected server response: 520',
  error: Error: Unexpected server response: 520
      at ClientRequest.<anonymous> (/home/fixmyrights/discord-bot/node_modules/ws/lib/websocket.js:595:7)

[finnbear]

Updating dependencies with npm update seems to have helped - the bot printed a status update for the first time in 2 months.