Bump to v4.16.5.

isError.js

@@ -1,17 +1,10 @@
-var isObjectLike = require('./isObjectLike');
+var baseGetTag = require('./_baseGetTag'),
+    isObjectLike = require('./isObjectLike'),
+    isPlainObject = require('./isPlainObject');
 
 /** `Object#toString` result references. */
-var errorTag = '[object Error]';
-
-/** Used for built-in method references. */
-var objectProto = Object.prototype;
-
-/**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
-var objectToString = objectProto.toString;
+var domExcTag = '[object DOMException]',
+    errorTag = '[object Error]';
 
 /**
  * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
@@ -35,8 +28,9 @@ function isError(value) {
   if (!isObjectLike(value)) {
     return false;
   }
-  return (objectToString.call(value) == errorTag) ||
-    (typeof value.message == 'string' && typeof value.name == 'string');
+  var tag = baseGetTag(value);
+  return tag == errorTag || tag == domExcTag ||
+    (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
 }
 
 module.exports = isError;