Give - Recurring Donations 2.9.0

* Fix: Resolved an issue with Stripe subscriptions that were set to cancel after a certain number of renewals not properly cancelling in Stripe if already set to a completed status in the plugin. We also improved the error handling so that the system will log more description about the subscription if an issue occurs.

* Important: In this version we have patched an important security vulnerability. The fix prevents malicious actors from gaining unauthorized access to donor subscriptions where they would then be able to update subscription amounts or cancel the subscription. Please note: no credit card data or information was ever compromised as we never store card sensitive information to your database. Please update immediately and [contact our support](https://givewp.com/support/) if you have any issues or questions.

* New: Added the Stripe payment gateway SEPA Direct Debit as a compatible gateway option to accept recurring donations through. This is a popular payment method in Europe and only requires a single IBAN payment field to process a one time or recurring donation.
* Fix: Resolved an issue with the "Subscription Payment Failed Email" formatting being incorrect for new installs and also a typo contained within the email's default content.