List react16 as supported

Author: jarekwg

package.json

@@ -37,8 +37,8 @@
     "react-dnd-html5-backend": "^2.1.2"
   },
   "peerDependencies": {
-    "react": "0.14.x || 15.x",
-    "react-dom": "0.14.x || 15.x"
+    "react": "0.14.x || 15.x || 16.x",
+    "react-dom": "0.14.x || 15.x || 16.x"
   },
   "devDependencies": {
     "babel-cli": "^6.6.4",