message: add test for '!discord bridge guildId/channelId' syntax
diff: @@ -489,6 +489,17 @@ describe("MatrixRoomHandler", () => {
  }, context);
  expect(evt.body).to.contain("Invalid syntax");
  });
  + it("will bridge with x/y syntax", async () => {
  + const handler: any = createRH({powerLevels: {
  + users_default: 100,
  + }});
  + const context = {rooms: {}};
  + const evt = await handler.ProcessCommand({
  + content: {body: "!discord bridge 123 456"},
  + room_id: "!123:localhost",
  + }, context);
  + expect(evt.body).equals("I have bridged this room to your channel");
  + });
  });
  describe("!discord unbridge", () => {
  it("will unbridge", async () => {
  