Updating module version in example

Author: tomekvenits

example/package.json

@@ -12,7 +12,7 @@
     "react": "16.8.3",
     "react-dom": "16.8.3",
     "react-native": "https://github.com/expo/react-native/archive/sdk-35.0.0.tar.gz",
-    "react-native-map-clustering": "^3.3.0",
+    "react-native-map-clustering": "^3.3.3",
     "react-native-maps": "^0.26.1",
     "react-native-web": "^0.11.7"
   },