Fix suggestion for wrong time in datetime rule by using wordpress timezone

Hello,

Many thanks for this great plugin !

It would be perfect if you could add a small fix to correct wrong time in date on non UTC timezone systems ??

By adding this line:
date_timezone_set($datetime, timezone_open(get_option('timezone_string')));

After line 88 in class-datetime-option.php
$datetime = \DateTime::createFromFormat( 'U.u', number_format(microtime(true), 6, '.', '') );

Yours faithfully