Shopify/active_merchant — pull request #1279 by duff (2014-06-27 19:05:07+00:00)
Title: Stripe: Add ability to verify a card

For Stripe, a verification is an `authorization` followed by a `void` of
that authorization.

The minimum authorization Stripe allows is 50 cents so we use that.

Relevant docs:
https://stripe.com/docs/api#create_charge