Bump to v4.13.0.

isBuffer.js

@@ -1,26 +1,14 @@
-import constant from './constant';
-import root from './_root';
-
-/** Used to determine if values are of the language type `Object`. */
-var objectTypes = {
-  'function': true,
-  'object': true
-};
+import root from './_root.js';
+import stubFalse from './stubFalse.js';
 
 /** Detect free variable `exports`. */
-var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
-  ? exports
-  : undefined;
+var freeExports = typeof exports == 'object' && exports;
 
 /** Detect free variable `module`. */
-var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
-  ? module
-  : undefined;
+var freeModule = freeExports && typeof module == 'object' && module;
 
 /** Detect the popular CommonJS extension `module.exports`. */
-var moduleExports = (freeModule && freeModule.exports === freeExports)
-  ? freeExports
-  : undefined;
+var moduleExports = freeModule && freeModule.exports === freeExports;
 
 /** Built-in value references. */
 var Buffer = moduleExports ? root.Buffer : undefined;
@@ -42,7 +30,7 @@ var Buffer = moduleExports ? root.Buffer : undefined;
  * _.isBuffer(new Uint8Array(2));
  * // => false
  */
-var isBuffer = !Buffer ? constant(false) : function(value) {
+var isBuffer = !Buffer ? stubFalse : function(value) {
   return value instanceof Buffer;
 };