Fix default export of joystick_dpad4

src/hub.js

@@ -15,7 +15,7 @@ import "aframe-rounded";
 import "webrtc-adapter";
 
 import trackpad_dpad4 from "./behaviours/trackpad-dpad4";
-import { joystick_dpad4 } from "./behaviours/joystick-dpad4";
+import joystick_dpad4 from "./behaviours/joystick-dpad4";
 import { PressedMove } from "./activators/pressedmove";
 import { ReverseY } from "./activators/reversey";
 import "./activators/shortpress";