WPMU DEV - Pro Sites 3.6.1

Added: Card update form for Stripe customers.
Added: Setting to log the Stripe errors to the error log.
Added: Responsive pricing tables.
Added: New action & filter hooks (pro_sites_email_notification) for email notifications.
Updated: Updated Stripe library.
Updated: Updated checkout screen for Stripe.
Updated: Log webhook event id for easier debugging.
Updated: Do not log unwanted webhook events to site meta.
Updated: Remove deprecated functions.
Updated: Minimum PHP version is updated to 5.4.
Fixed: Do not cancel subscriptions immediately unless the site is deleted.

New: DB upgrade for older installations.
New: Show site title and URL on free sites.
Fixed: Conflict with NBT template selection.
Fixed: Payment receipt email not being sent.
Fixed: Wrong password in the email when a site is manually activated.
Fixed: Wrong trial period length when using Manual payments.
Fixed: Wrong admin URL for the additional registrations.
Fixed: GDPR checkbox disappears in the signup form.
Fixed: XML-RPC not working on subsites.
Fixed: Pay To Blog module blocks Free level.
Fixed: Missing translation strings.
Fixed: Conflicts with PHP 7.0+.

-Added: Indian Rupee support to PayPal.
-Fixed: Stripe payments are not working after upgrading to latest version of Stripe API.
-Fixed: Trial period continues to be doubled.