Update package.json

Author: RickWong

package.json

@@ -21,7 +21,7 @@
     "watch": "eval 'npm run watch-client >tmp/client.log 2>&1 & CLIENT_PID=$!';     sleep 3;    npm run start;     kill $CLIENT_PID;"
   },
   "dependencies": {
-    "react": "0.12.2"
+    "react": "^0.12.2"
   },
   "devDependencies": {
     "babel-core": "4.7.1",