release v2.13.1

Author: KevinVandy

apps/material-react-table-docs/pages/changelog.mdx

@@ -14,6 +14,7 @@ import Head from 'next/head';
 - Upgraded to TanStack Table v8.19.3
 - Upgraded to TanStack Virtual v3.8.3
 - Fixed EditTextField to allow custom select props
+- converted `MRT_ColumnDef` and `MRT_TableOptions` types to interfaces to allow for declaration merging
 
 ### Version 2.13.0 - 2024-04-18