Bump to v4.16.5.

isBoolean.js

@@ -1,18 +1,9 @@
+import baseGetTag from './_baseGetTag.js';
 import isObjectLike from './isObjectLike.js';
 
 /** `Object#toString` result references. */
 var boolTag = '[object Boolean]';
 
-/** 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;
-
 /**
  * Checks if `value` is classified as a boolean primitive or object.
  *
@@ -32,7 +23,7 @@ var objectToString = objectProto.toString;
  */
 function isBoolean(value) {
   return value === true || value === false ||
-    (isObjectLike(value) && objectToString.call(value) == boolTag);
+    (isObjectLike(value) && baseGetTag(value) == boolTag);
 }
 
 export default isBoolean;