* Fixed PHP code print issue.

* Fix: Notice: Undefined variable: user_role during guest checkout
* Fix: Notice: Undefined variable: email during guest checkout
* Update: POT file

* Add-Parcel Select Ground™ service

* Opayo Form-Refunds (requires Opayo Reporting credentials)
* Opayo Form-Voids (requires Opayo Reporting credentials)

* Feature-Added setting for changing the location of the subscription field in the checkout form.
* Tweak-Reorganized the subscription settings fields.
* Tweak-Tested compatibility with WC 5.5.
* Tweak-Tested compatibility with WP 5.8.
* Dev-Deprecated the `wc_newsletter_subscription_checkout_content_location` filter in favor of `wc_newsletter_subscription_checkout_locations`.