Update to NPM version

ProjectSourceCode/node_modules/is-buffer/index.js

@@ -0,0 +1,11 @@
+/*!
+ * Determine if an object is a Buffer
+ *
+ * @author   Feross Aboukhadijeh <https://feross.org>
+ * @license  MIT
+ */
+
+module.exports = function isBuffer (obj) {
+  return obj != null && obj.constructor != null &&
+    typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
+}