Incompatibility with PHP 7?

Hi there, I’m using the PHP Compatibility Checker plugin and I’m seeing Ad Inserter is the only plugin incompatible with PHP 7. Is this a false positive or should I really not upgrade?

Here’s the report it’s giving me:

FILE: /wp-content/plugins/ad-inserter/includes/adsense-api.php
----------------------------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
----------------------------------------------------------------------------------------
 1 | WARNING | File has mixed line endings; this may cause incorrect results
----------------------------------------------------------------------------------------

FILE: /wp-content/plugins/ad-inserter/includes/editor.php
-----------------------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
-----------------------------------------------------------------------------------
 1 | WARNING | File has mixed line endings; this may cause incorrect results
-----------------------------------------------------------------------------------

FILE: /wp-content/plugins/ad-inserter/includes/phpQuery.php
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
FOUND 2 ERRORS AND 3 WARNINGS AFFECTING 5 LINES
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
 2233 | WARNING | Method name "phpQueryObject::__pseudoClassParam" is discouraged; PHP has reserved all method names with a double underscore prefix for future use
 2469 | WARNING | Method name "phpQueryObject::__loadSuccess" is discouraged; PHP has reserved all method names with a double underscore prefix for future use
 4209 | ERROR   | Function split() is deprecated since PHP 5.3 and removed since PHP 7.0; Use preg_split() instead
 4277 | WARNING | Method name "phpQueryObject::__dumpTree" is discouraged; PHP has reserved all method names with a double underscore prefix for future use
 5639 | ERROR   | Using 'break' outside of a loop or switch structure is invalid and will throw a fatal error since PHP 7.0
--------------------------------------------------------------------------------------------------------------------------------------------------------------------

Thank you,
Chris