Log Message:
www/ruby-websocket-driver: updat to 0.7.1

Update ruby-websocket-driver to 0.7.1.

### 0.7.1 / 2019-06-10

- Catch any exceptions produced while generating a handshake response and send a
  `400 Bad Request` response to the client
- Pick the RFC-6455 protocol version if the request contains any of the headers
  used by that version
- Handle errors encountered while handling malformed draft-76 requests