docs: add 4.0 migration guide to readme

README.md

@@ -29,4 +29,7 @@ Once the Cypress UI is open, you can then click on "Run all Specs" to execute al
 
 ## SlickGrid 3.x drops jQueryUI requirement
 
-Great news we no longer require [jQueryUI](https://jqueryui.com/) in SlickGrid 3.0.0, we removed all associated code and replaced it with [SortableJS](https://sortablejs.github.io/Sortable/) which is a lot more modern and touch friendly. Please read [SlickGrid 3.0 - Annoucement & Migration](https://github.com/6pac/SlickGrid/wiki/Major-version-3.0----Removal-of-jQueryUI-requirement-(replaced-by-SortableJS)) Wiki for more info.
+We no longer require [jQueryUI](https://jqueryui.com/) in SlickGrid 3.0, we removed all associated code and replaced it with [SortableJS](https://sortablejs.github.io/Sortable/) which is a lot more modern and touch friendly. Please read [SlickGrid 3.0 - Annoucement & Migration](https://github.com/6pac/SlickGrid/wiki/Major-version-3.0----Removal-of-jQueryUI-requirement-(replaced-by-SortableJS)) Wiki for more info.
+
+## SlickGrid 4.x drops jQuery requirement
+SlickGrid is now using native code and no longer requires jQuery in SlickGrid 4.0. Please read [SlickGrid 4.0 - Annoucement & Migration](https://github.com/6pac/SlickGrid/wiki/Major-version-4.0---Removal-of-jQuery-requirement)