If `work()` resolves too quickly, multiple machines execute at the same time.

[WeeJeWel]

Consider this code:

this.bossbat.hire('cronjob', {
  every: '1 seconds',
  work: async () => {
    console.log(new Date(), 'Cronjob fired');
    await new Promise(resolve => setTimeout(resolve, 1000)); // This is a workaround that fixes this
  },
});

If the 'await new Promise' wasn't there, multiple machines would execute the same command because the lock was already released before the other server tried to get it.