psalm.xml

<?xml version="1.0"?>
<psalm
        errorLevel="3"
        resolveFromConfigFile="true"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns="https://getpsalm.org/schema/config"
        xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
>
    <projectFiles>
        <directory name="lib"/>
        <ignoreFiles>
            <directory name="vendor"/>
        </ignoreFiles>
    </projectFiles>
    <issueHandlers>
        <MissingReturnType>
            <errorLevel type="suppress">
                <file name="lib/pollyfill.php"/>
            </errorLevel>
        </MissingReturnType>
        <MissingParamType>
            <errorLevel type="suppress">
                <file name="lib/pollyfill.php"/>
            </errorLevel>
        </MissingParamType>
    </issueHandlers>

</psalm>