Magento v2.2.x and Stripe v3 Support

• Remove Magento v2.0.x and add Magento v2.2.x support in composer.json
• Upgrade Stripe.js to v3 (hosted fields)
• Upgrade stripe-php to ~5.2.0

Bugfixes

• Update scoping of Title configuration, allowing Store View values.
• Correct missing Stripe\Customer import in PaymentDataBuilder, causing a fatal error when attempting to store card information in Vault.

Bugfixes

• Update version requirement for magento/module-vault in composer.json
• Fix error when saving cards from admin order

Allow Saved Payments

• Payment information can be saved for customer accounts during frontend and backend checkout.
• Stored payment methods are available for use in frontend and backend.
• Stored cards are deleted from customer accounts in Stripe when deactivated by customers in Magento.
• Tokenization support was added to the Admin payment form.