Add support for 15.0.0

Author: davidchin

package.json

@@ -64,7 +64,8 @@
     "watchify": "^3.3.0"
   },
   "peerDependencies": {
-    "react": "^0.14.0"
+    "react": "^0.14.0 || ^15.0.0",
+    "react-dom": "^0.14.0 || ^15.0.0"
   },
   "browserify": {
     "transform": [