Update gamepad.js (#855)

The objects traversed by the “foreach” method should be arrays, and the “Array.from()” method should be used to convert the traversal objects to arrays, ensuring that they run in some more restrictive browsers.

data/gamepad.js

@@ -37,7 +37,7 @@ class GamepadHandler {
         this.timeout = setTimeout(this.loop.bind(this), 10);
     }
     updateGamepadState() {
-        const gamepads = this.getGamepads();
+        const gamepads = Array.from(this.getGamepads());
         gamepads.forEach((gamepad, index) => {
             if (!gamepad) return;
             let hasGamepad = false;