Feedwordpress and PHP 7

I can not migrate beyond PHP 5.4.

Using PHP Compatibility Checker I get this as “error”
FILE: /home/www/actoderepudio.impela.net/wp-content/plugins/feedwordpress/feedwordpresssyndicationpage.class.php
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FOUND 3 ERRORS AFFECTING 3 LINES
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868 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
991 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
1221 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
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