v2.0.0: Updated for zc210+, EO 5.0.0+, PHP 8.0+

This release updates the order-total for continued operation under Zen Cart v2.1.0+, Edit Orders 5.0.0+ and PHP 8.0+.

v1.3.0: Future Proofing and OPC Integration

This release contains changes associated with the following GitHub issues:

#1: Various updates for PHP 7.0+
#2: Use drop-down instead of checkbox to "gather" input
#3: Remove redundant configuration setting.

v1.3.0-beta2: Capture missing language file

This release is identical to the beta1 version, with the exception that the language file is now "properly" included.

v1.3.0: Future Proofing and OPC Integration

This release contains changes associated with the following GitHub issues:

#1: Various updates for PHP 7.0+
#2: Use drop-down instead of checkbox to "gather" input
#3: Remove redundant configuration setting.