5ee5847ba751c43966d2f2ca47feeedcce9ea854 Types: Fix integration with …

…DataTables `ext` object

Types: `new Buttons` constructor returns an instance of Buttons
Types: Button methods have their own trigger method

Sync to source repo @5ee5847ba751c43966d2f2ca47feeedcce9ea854

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/Buttons",
     "last-tag": "2.4.2",
-    "last-sync": "8641fdfdc66d12fe88cb5eaf8a2bfc9d5d1d7add"
+    "last-sync": "5ee5847ba751c43966d2f2ca47feeedcce9ea854"
 }