Gravity Forms Stripe Addon 5.8.0

- Added the gform_stripe_charge_pre_create filter. See gform_stripe_charge_pre_create - Gravity Forms Support
- Added translations.
- Fixed spinner appearing when the previous button on the last page of a multi-page non-AJAX form is clicked.
- Fixed Stripe.js request being made when the previous button on the last page of a multi-page form is clicked.
- Fixed a fatal error which could occur if an older version of the Stripe API library is loaded by another plugin.

Fixed spinner appearing when the previous button on the last page of a multi-page non-AJAX form is clicked.

- Added $meta_key as the fifth parameter of the gform_stripe_field_value filter, containing the custom meta key currently being processed.
- Updated string "Stripe Receipt" so it could be translated.
- Updated Stripe API library to version 4.3.0.