PHP 8.1+ Support

Webhost: BlueHost
PHP Version: 8.3

When activating the plugin, the site breaks. Looking into the culprit and it seems this line is the problem:

    return new GuzzleClient([
        RequestOptions::CRYPTO_METHOD => Config::$defaultTlsMethod,
        RequestOptions::CONNECT_TIMEOUT => Config::$defaultConnectionTimeout,
        RequestOptions::TIMEOUT => Config::$defaultRequestTimeout,
        RequestOptions::HTTP_ERRORS => true,
        'handler' => $this->handlerStack,
    ]);

The first RequestOptions uses Crypto Method which apparently isn’t there in PHP 8, so I had to change to this instead:
‘curl’ => [CURLOPT_SSLVERSION => CURL_SSLVERSION_TLSv1_2]

this is under vendor/saloonphp/saloon/src/Http/Senders

I also get 2 addition notices regarding REST API I will have to look into but at least that one change to use curl seems to have addressed the PHP 8.1+ issue.

Notice: Function register_rest_route was called incorrectly. The REST API route definition for zonos-for-woocommerce/v1/order/update-tracking-number is missing the required permission_callback argument.

Notice: Function register_rest_route was called incorrectly. The REST API route definition for zonos-for-woocommerce/v1/order/update-status is missing the required permission_callback argument.

Both of these mention that REST API routes that are intended to be public, use __return_true as the permission callback.