The plugin currently does not set a "Requires PHP", so we'll want to work on testing and adding compatibility for PHP 8 so that we can declare that more formally within the code.

• add PHP Compatibility action: https://github.com/10up/insert-special-characters/blob/develop/.github/workflows/php-compatibility.yml
• add PHP 8.3 compatibility (or a lessor version as required by the codebase or Mailchimp constraints)
• add "Requires PHP" header value with associated minimum to the main PHP file
• add "PHP tested up to" header value with associated known maximum to the main PHP file
• update

  wordpress/composer.json

  Line 15 in 3dd04ab

  "php": ">=5.6"

  to note PHP minimum