PHP 5.6 Compatability

I am being asked to upgrade to PHP 5.6 with my hosting. They ask me to run a checker and it came back with warnings and errors for WPeMatico.

Here are the details:
FILE: /wp-content/plugins/wpematico/app/wpematico_functions.php
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FOUND 3 ERRORS AND 1 WARNING AFFECTING 4 LINES
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800 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
801 | ERROR | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
802 | ERROR | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
813 | ERROR | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
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FILE: /wp-content/plugins/wpematico/app/debug_page.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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256 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
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FILE: /wp-content/plugins/wpematico/app/campaign_fetch.php
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FOUND 2 ERRORS AND 3 WARNINGS AFFECTING 3 LINES
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61 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
61 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
61 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
597 | ERROR | The function dirname does not have a parameter “levels” in PHP version 5.6 or earlier
599 | ERROR | The function dirname does not have a parameter “levels” in PHP version 5.6 or earlier
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FILE: /wp-content/plugins/wpematico/app/lib/SimplePie.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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703 | WARNING | INI directive ‘zend.ze1_compatibility_mode’ is removed since PHP 5.3.
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FILE: /wp-content/plugins/wpematico/app/lib/SimplePie/File.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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112 | WARNING | INI directive ‘safe_mode’ is deprecated since PHP 5.3 and removed since PHP 5.4.
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FILE: /wp-content/plugins/wpematico/app/lib/SimplePie/Item.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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124 | WARNING | INI directive ‘zend.ze1_compatibility_mode’ is removed since PHP 5.3.
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