Do not collect Zip code with Stripe

Thankfully, this should be a pretty simple fix! hidePostalCode: true should be a top level property in your options, rather than nested under style here.

https://stripe.com/docs/stripe.js#element-options

var card = elements.create('card', {
hidePostalCode: true,
style: {
 base: {
  iconColor: '#666EE8',
  color: '#31325F',
  lineHeight: '40px',
  fontWeight: 300,
  fontFamily: '"Helvetica Neue", Helvetica, sans-serif',
  fontSize: '15px',

  '::placeholder': {
    color: '#CFD7E0',
   },
  }, 
 } 
});

card.mount('#card-element');