setup-php/node_modules/resolve/lib/normalize-options.js

module.exports = function (x, opts) {
    /**
     * This file is purposefully a passthrough. It's expected that third-party
     * environments will override it at runtime in order to inject special logic
     * into `resolve` (by manipulating the options). One such example is the PnP
     * code path in Yarn.
     */

    return opts || {};
};