WooCommerce PDF Product Vouchers 3.12.3

* Fix - Avert possible fatal errors in front end or admin when deleting a template with existing vouchers
* Fix - Set a longer timeout if loopback connections are supported while getting the voucher HTML to avoid wp_remote_get() timeouts

* Tweak - When erasing personal data from orders or removing access to downloads upon customer personal data erasure request, delete purchaser information from associated voucher records
* Misc - Add support for WooCommerce 3.4

2018.05.03 - version 3.4.1
* Fix - Add back font maps accidentally removed in 3.4.0

2018.05.03 - version 3.4.0
* Feature - Use vouchers as store gift certificates! You can now allow vouchers to be redeemed online
* Feature - Streamline voucher management to void remaining voucher balance when voucher order is refunded, cancelled, or failed
* Tweak - Automatically set the expiration date for manually-created vouchers if the template has expiry days set
* Tweak - Use product's regular (non-discounted) price as voucher value, when voucher products have a sale price
* Fix - Ensure voucher number is correctly displayed when manually adding a new voucher
* Fix - Address a deprecation notice when checking if an order is fully redeemed
* Fix - Address a conflict with Jetpack causing voucher generation errors
* Misc - Require WordPress 4.7 or newer