PHP 7.3 support

Dear Support Team,

Many thanks for your plugin!

We are using your plugin for years. Unfortunately, it does not support PHP 7.3 yet. We have the same problem as here https://ww.wp.xz.cn/support/topic/mailpoet-2-and-php-7-3/
I have tried this solution but it did not work https://ww.wp.xz.cn/support/topic/subscription-widget-exception-errors-under-php-7-3/

When will you release an update for PHP 7.3?

Thanks in advance!