Add react & react dom peer dependencies

Author: JakeSidSmith

package.json

@@ -40,5 +40,9 @@
     "react": ">=0.14.7",
     "react-dom": ">=0.14.7",
     "watchify": "=3.6.1"
+  },
+  "peerDependencies": {
+    "react": "*",
+    "react-dom": "*"
   }
 }