Add instanceof check

Author: kgryte

lib/node_modules/@stdlib/assert/is-boolean/lib/object.js

@@ -43,6 +43,9 @@ var test = require( './try2serialize.js' );
 */
 function isBoolean( value ) {
 	if ( typeof value === 'object' ) {
+		if ( value instanceof Boolean ) {
+			return true;
+		}
 		if ( hasToStringTag ) {
 			return test( value );
 		}