possible php error

My WP and Woocommerce installation has told me to update my php version.

I have installed PHP Compatibility Checker to see if I get any problems.

PHP Compatibility Checker gives me this warning related to your plugin:

Name: Shipmondo for WooCommerce

FILE: /plugins/pakkelabels-for-woocommerce/lib/php/field_calculator.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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37 | WARNING | Function create_function() is deprecated since PHP 7.2; Use an anonymous function instead
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