message: Fix key.pem on Node.js 9
diff: @@ -309,7 +309,7 @@ it('creates a client on connection', () => {
  ws.internalOnError = reject
  })
  }).then(() => {
  - expect(Object.keys(app.clients).length).toBe(1)
  + expect(Object.keys(app.clients)).toHaveLength(1)
  expect(app.clients[1].remoteAddress).toEqual('127.0.0.1')
  })
  })
  @@ -324,7 +324,7 @@ it('creates a client manually', () => {
  }
  }
  })
  - expect(Object.keys(app.clients).length).toBe(1)
  + expect(Object.keys(app.clients)).toHaveLength(1)
  expect(app.clients[1].remoteAddress).toEqual('127.0.0.1')
  })
  @@ -364,7 +364,7 @@ it('accepts custom HTTP server', () => {
  ws.onerror = reject
  })
  }).then(() => {
  - expect(Object.keys(app.clients).length).toBe(1)
  + expect(Object.keys(app.clients)).toHaveLength(1)
  })
  })
  