extensions/stripe#124

Fix and record paymentIntents for recurring contributions - show authentication to user on thankyou page

Set pre-approval params for paymentMethodID (used for recurring payments) as well as paymentIntentID

When we don't know the amount, pre-auth the card but don't confirm, then update the amount requested

Allow submission of drupal webform when there are multiple processors on the page (eg. Stripe + Pay later)

Validate payment forms using javascript so we don't create multiple uncaptured paymentIntents when the form is not valid