system.multicall

Hey, could you update system.multicall addon to PHP7?

This is the report from PHP Compatibility checker:

FILE: /home/…/www/wp-content/plugins/multicheck/MultiCheck.php
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FOUND 4 ERRORS AFFECTING 4 LINES
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36 | ERROR | Global variable ‘$HTTP_RAW_POST_DATA’ is deprecated since PHP 5.6 and removed since PHP 7.0 – use php://input instead.
37 | ERROR | Global variable ‘$HTTP_RAW_POST_DATA’ is deprecated since PHP 5.6 and removed since PHP 7.0 – use php://input instead.
38 | ERROR | Global variable ‘$HTTP_RAW_POST_DATA’ is deprecated since PHP 5.6 and removed since PHP 7.0 – use php://input instead.
40 | ERROR | Global variable ‘$HTTP_RAW_POST_DATA’ is deprecated since PHP 5.6 and removed since PHP 7.0 – use php://input instead.
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