config: update version code

Author: SolarianZ

package.json

@@ -1,6 +1,6 @@
 {
   "name": "com.greenbamboogames.playablegraphmonitor",
-  "version": "0.0.1",
+  "version": "0.0.3",
   "displayName": "PlayableGraphMonitor!",
   "description": "PlayableGraph monitor.",
   "unity": "2019.4",
@@ -15,4 +15,4 @@
   },
   "type": "tool",
   "hideInEditor": false
-}
+}