We don't want foreign keys in migrations going forward as they can be
expensive for large tables. However, we shouldn't be changing old
migrations, so we're having rubocop ignore it in this plugin for now.
* FIX: Loading state persists after bad card entered
If a bad card number was entered and the subscribe button clicked, the
subscription button still disappeared and subscribing was not possible
without refreshing the page.
* UX: Add missing tooltip
* DEV: Ignore gems directory for local rubocop runs
David Taylor
Jarek Radosz
Justin DiRose