Transport disconnect method (#753)

* Prevent reads from piling up

* Implement disconnect() method for all transports

packages/transport-deno/src/transport.ts

@@ -4,6 +4,7 @@ import { Utils } from "@meshtastic/core";
 export class TransportDeno implements Types.Transport {
   private _toDevice: WritableStream<Uint8Array>;
   private _fromDevice: ReadableStream<Types.DeviceOutput>;
+  private connection: Deno.Conn | undefined;
 
   public static async create(hostname: string): Promise<TransportDeno> {
     const connection = await Deno.connect({
@@ -14,10 +15,11 @@ export class TransportDeno implements Types.Transport {
   }
 
   constructor(connection: Deno.Conn) {
-    Utils.toDeviceStream.readable.pipeTo(connection.writable);
+    this.connection = connection;
+    Utils.toDeviceStream.readable.pipeTo(this.connection.writable);
 
     this._toDevice = Utils.toDeviceStream.writable;
-    this._fromDevice = connection.readable.pipeThrough(
+    this._fromDevice = this.connection.readable.pipeThrough(
       Utils.fromDeviceStream(),
     );
   }
@@ -29,4 +31,10 @@ export class TransportDeno implements Types.Transport {
   get fromDevice(): ReadableStream<Types.DeviceOutput> {
     return this._fromDevice;
   }
+
+  disconnect(): Promise<void> {
+    this.connection.close();
+    this.connection = undefined;
+    return Promise.resolve();
+  }
 }