Is plugin compatible with 7.2?

When running the PHP Compatibility Scanner for PHP 7.2, I get the following warnings:

FILE: /wp-content/plugins/search-and-replace/inc/Database/Exporter.php
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FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
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423 | WARNING | Function each() is deprecated since PHP 7.2; Use a foreach loop instead
461 | WARNING | The variable ‘$php_errormsg’ is deprecated since PHP 7.2; Use error_get_last() instead
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Are these actual warnings, or are they in the code for compatibility purposes?