update readme

Author: azmy60

README.md

@@ -4,6 +4,7 @@ This branch contains version 6.2.0 including these fixes:
 - fix autoscroll on long columns https://github.com/olifolkerd/tabulator/pull/4479
 - fix navigation conflict with SelectRange and Edit https://github.com/olifolkerd/tabulator/pull/4516
 - blur editor after pressing next/prev https://github.com/olifolkerd/tabulator/pull/4517
+- 13f9a9b9 fix errors when handling BigInt
 
 <p align="center">
   <img height="200" src="http://tabulator.info/images/logos/t_hollow.png">