Bump to v4.16.5.

_baseIsDate.js

@@ -1,18 +1,9 @@
-var isObjectLike = require('./isObjectLike');
+var baseGetTag = require('./_baseGetTag'),
+    isObjectLike = require('./isObjectLike');
 
 /** `Object#toString` result references. */
 var dateTag = '[object Date]';
 
-/** 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;
-
 /**
  * The base implementation of `_.isDate` without Node.js optimizations.
  *
@@ -21,7 +12,7 @@ var objectToString = objectProto.toString;
  * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
  */
 function baseIsDate(value) {
-  return isObjectLike(value) && objectToString.call(value) == dateTag;
+  return isObjectLike(value) && baseGetTag(value) == dateTag;
 }
 
 module.exports = baseIsDate;