Extension 'mysql_' is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead

Hi,

Getting following error after runnig PHPCS

phpcs --standard=PHPCompatibility --extensions=php,module,inc,install,test,profile,theme --runtime-set testVersion 7.2 modules/contrib/htmlpurifier

FILE: sites\default\modules\contrib\htmlpurifier\htmlpurifier.install
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FOUND 1 ERROR AFFECTING 1 LINE
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278 | ERROR | Extension 'mysql_' is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
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Any plan to fix this error?