Requires mjwshared (Payment Shared) 1.2.10 and Firewall 1.5.6

• Require Firewall 1.5.6.
• Cleanup and remove legacy error handling.
• Add check for extra data.
• Make firewall a required extension.
• Add check for failed paymentIntents.
• Add civi.stripe.authorize event which is used by other extensions (eg. Firewall, Formprotection with ReCAPTCHA) to authorize or deny access to StripePaymentintent API calls.
• Add support for passing ReCAPTCHA token to backend so it can be used to validate API calls.
• Fix #397 Error: Call to undefined method Stripe\Exception\InvalidArgumentException::getJsonBody().