PHP check brings up errors in Social media Plugin

I am in the process of updating the PHP in my site and when running a compatibility it gives errors for the Social Media & Share Icon plugin. I use the free version. Here is what it says.

FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/analyst/src/Collector.php
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FOUND 1 ERROR AFFECTING 1 LINE
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174 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/css/jquery-ui-1.10.4/images/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/css/images/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/icons_theme/chrome_grey/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/icons_theme/official/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/icons_theme/black/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/icons_theme/badge/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/icons_theme/chrome_blue/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/icons_theme/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/icons_theme/stitched/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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FILE: /home/fuj5ys3zkdj0/public_html/wp-content/plugins/ultimate-social-media-icons/images/icons_theme/cute/index.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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1 | WARNING | File has mixed line endings; this may cause incorrect results
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