* Fix: Stripe subscription renewals now record a renewal payment and extend the membership expiration.
* Fix: Stripe payments in a currency with a different number of decimals than the store currency were recorded with the wrong amount.
* Fix: Free trials on paid membership levels were processed as free memberships, so no Stripe subscription was created and access ended with the trial.
* Fix: A declined card no longer leaves a duplicate pending membership behind on the next attempt.
* Fix: Stripe card declines were rejected by their own security check, so failed registrations were never recorded as failed.
* Fix: Resolved PHP warnings that could occur when another plugin using Composer was active on the same site.
