PHP7 support for this plugin

Hi there,

I love your plugin. It has helped me already many times. I was wondering, when can we expect this plugin to be PHP7 ready? I ran a compatibility test and got the below results;

FILE: wp-content/plugins/better-image-credits/better-image-credits.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: wp-content/plugins/better-image-credits/class-admin.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: wp-content/plugins/better-image-credits/class-credits-widget.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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