Add ability to make new call

types/twilio-client.d.ts

@@ -91,7 +91,7 @@ declare module "twilio-client"
 		constructor(token: string, params?: SetupParams);
 		public setup(token: string, params?: SetupParams): void;
 		public connect(params: any, audioConstraints?: any): Connection;
-		public activeConnection(): Connection;
+		public activeConnection(): Connection | undefined;
 		public destroy(): void;
 		public disconnectAll(): void;
 		public status(): DeviceStatus;