function normalizeSeparators(p) {
    p = p || '';
    // Windows
    if (IS_WINDOWS) {
        // Convert slashes on Windows
        p = p.replace(/\//g, '\\');
        // Remove redundant slashes
        const isUnc = /^\\\\+[^\\]/.test(p); // e.g. \\hello
        return (isUnc ? '\\' : '') + p.replace(/\\\\+/g, '\\'); // preserve leading \\ for UNC
    }
    // Remove redundant slashes
    return p.replace(/\/\/+/g, '/');
}
Removes redundant slashes and converts `/` to `\` on Windows