v6.0.0

New Features

• injectStripe now injects a reference to the Elements instance created by
  <Elements> as the prop elements.

The primary reason you would want an Elements instance is to use elements.getElement(), which provides an easy way to get a reference to an Element. You will need to get a reference to an Element to use confirmCardPayment, confirmCardSetup(), or createPaymentMethod().

Note that the old API for createPaymentMethod will continue to work and
provide automatic element injection, but we are updating documentation and
examples to use the new argument shape:

// old shape with automatic element detection - still works
this.props.stripe.createPaymentMethod('card').then(/* ... */);

// new shape without automatic element detection - recommended and 
// will work with new non-card PaymentMethods
this.props.stripe
  .createPaymentMethod({
    type: 'card',
    card: this.props.elements.getElement('card'),
  })
  .then(/* ... */);

Breaking Changes

• We have removed the getElement method on RSE components that we introduced
  in v5.1.0 in favor of the above change. Sorry for the churn.