Crash when shutting down.

[MarcGodard]

When running:

kodi(host, 9090)
        .then(connection => {
          connection.System.Shutdown()
          console.log("Kodi Power Off Success")
        })

Kodi Power Success
events.js:165
      throw er; // Unhandled 'error' event
      ^

SyntaxError: Failed to handle response: Unexpected token � in JSON at position 0
    at JSON.parse (<anonymous>)
    at Schema.handleResponse (/Users/marcgodard/GitHub/remote-api/node_modules/jrpc-schema/lib/Schema.js:80:21)
    at WebSocket.<anonymous> (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/lib/Connection.js:30:18)
    at WebSocket.emit (events.js:180:13)
    at Receiver.ontext (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/WebSocket.js:841:10)
    at /Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/Receiver.js:536:18
    at Receiver.applyExtensions (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/Receiver.js:371:5)
    at /Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/Receiver.js:508:14
    at Receiver.flush (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/Receiver.js:347:3)
    at Receiver.finish (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/Receiver.js:541:12)
    at Receiver.expectHandler (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/Receiver.js:499:31)
    at Receiver.add (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/Receiver.js:103:24)
    at Socket.realHandler (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/node_modules/ws/lib/WebSocket.js:825:20)
    at Socket.emit (events.js:180:13)
    at addChunk (_stream_readable.js:269:12)
    at readableAddChunk (_stream_readable.js:256:11)
Emitted 'error' event at:
    at WebSocket.<anonymous> (/Users/marcgodard/GitHub/remote-api/node_modules/kodi-ws/lib/Connection.js:33:11)
    at WebSocket.emit (events.js:180:13)
    [... lines matching original stack trace ...]
    at readableAddChunk (_stream_readable.js:256:11)
    at Socket.Readable.push (_stream_readable.js:213:10)
    at TCP.onread (net.js:581:20)