adding some EventBus related proguard rules

app/proguard-rules.pro

@@ -0,0 +1,6 @@
+# EventBus
+-keepattributes *Annotation*
+-keepclassmembers class ** {
+    @org.greenrobot.eventbus.Subscribe <methods>;
+}
+-keep enum org.greenrobot.eventbus.ThreadMode { *; }