updated sys and created publi

publi/node_modules/is-builtin-module/index.js

@@ -0,0 +1,10 @@
+'use strict';
+var builtinModules = require('builtin-modules');
+
+module.exports = function (str) {
+	if (typeof str !== 'string') {
+		throw new TypeError('Expected a string');
+	}
+
+	return builtinModules.indexOf(str) !== -1;
+};