function isNodeBuiltin( x ) {
	if ( !isString( x ) ) {
		return false;
	}
	return contains( LIST, x );
}
Tests whether a string matches a Node.js built-in module name.

@param {*} x - value to test
@returns {boolean} boolean indicating whether a string matches a Node.js built-in module name

@example
var out = isNodeBuiltin( 'cluster' );
// returns true

@example
var out = isNodeBuiltin( 'crypto' );
// returns true

@example
var out = isNodeBuiltin( 'fs-extra' );
// returns false

@example
var out = isNodeBuiltin( '' );
// returns false