Move Devices to TS

src/device_manager/model/Devices.js → src/device_manager/model/Devices.ts

@@ -1,6 +1,6 @@
 import { Collection } from '../../common';
 import Device from './Device';
 
-export default class Devices extends Collection {}
+export default class Devices extends Collection<Device> {}
 
 Devices.prototype.model = Device;