Test updating from GitHub Updater v9.9.10 to Git Updater

test-ghu-gu-update.php

<?php
/**
 * Plugin Name:       Test GitHub Updater to Git Updater update
 * Plugin URI:        https://gist.github.com/afragen/64e4037576bd5292b5f3aeb1db39e0eb
 * Description:       Test the update process from GitHub Updater v9.9.10 to Git Updater.
 * Author:            Andy Fragen
 * Version:           0.1.0
 * Author URI:        http://thefragens.com
 * Gist Plugin URI: https://gist.github.com/afragen/64e4037576bd5292b5f3aeb1db39e0eb
 * License:           MIT
 * Requires PHP:      5.4
 */

add_filter('github_updater_set_options', function () {
    return ['current_branch_github-updater' => 'develop'];
});
add_filter('gu_set_options', function () {
    return ['current_branch_git-updater' => 'master'];
});