adf4ee1456695301ae836428a39451d61477932f Typescript: level parameter was missing from startRender and endRender

Typescript: The rendering functions get an `ApiRowMethods` object, not just a plain API one.
Typescript: `dataSrc` can accept an array of values to represent the levels

https://datatables.net/forums/discussion/79688/typedefinition-for-rowgroup-seems-to-be-not-complete#latest

Sync to source repo @adf4ee1456695301ae836428a39451d61477932f

Author: dtbuild

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/RowGroup",
     "last-tag": "1.5.0",
-    "last-sync": "f3c153644c8e609ea853374e13ced6ed4ce91696"
+    "last-sync": "adf4ee1456695301ae836428a39451d61477932f"
 }