title: How to change the next billing date with Braintree
body: <p>I've looked over the docs (<a href="https://www.braintreepayments.com/docs/ruby/subscriptions/overview" rel="noreferrer">https://www.braintreepayments.com/docs/ruby/subscriptions/overview</a>) and cannot see if it's possible to change the next billing date of an active subscription.</p>
  
  <p>We want the ability to pause our user's subscriptions without cancelling their subscription. So I'm hoping we can update the user's next billing date by 1, 3, or 6 months at a time.</p>