PHP 7 Compatibility

Hi, I am running PDF Viewer Lite on my wordpress site and want to update to PHP7. When I ran a scan to check for compatibility issues, I received the following warning and errors. Will these affect the functionality of the plugin? If yes, when will these be repaired?
 
Thanks in advance.
 
FILE: **removed for security**/plugins/pdf-light-viewer/controllers/PdfController.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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739 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4