Woocommerce FirstData 5.2.7

* Feature - Orders with only virtual items can now force a charge instead of authorization
* Feature - Enhanced payment form is now mobile-friendly (well, friendlier!) with `tel` type inputs
* Tweak - Update Mastercard payment icon and add BIN 2 series support
* Misc - Added support for WooCommerce 3.0
* Misc - Removed support for WooCommerce 2.4

* Fix - Disable the default CSC validation for saved credit cards when using Payeezy.js

* Fix - Include billing address in card tokenize requests to prevent AVS errors
* Fix - Adjust TeleCheck field formatting to prevent potential rejections
* Tweak - Add confirmation before switching to the Payeezy JS gateway