e880efbe6582516f7eece94926a5de6814e7729b Typescript: Add type defs fo…

…r the buttons that Select provides for the Buttons extension.

Sync to source repo @e880efbe6582516f7eece94926a5de6814e7729b

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/Select",
     "last-tag": "2.1.0",
-    "last-sync": "89f0b6b19b61eb7b6107e9e4e06eb82d650a58f4"
+    "last-sync": "e880efbe6582516f7eece94926a5de6814e7729b"
 }