browser.keyboard.down & browser.keyboar.up raises an error

[KutsOleksii]

/usr/local/bundle/gems/ferrum-0.11/lib/ferrum/keyboard.rb:35:in `down': no implicit conversion of Symbol into Integer (TypeError)
It rises in this code:

browser.keyboard.down(:pagedown)

any other key including "a" raises the same error
this is line 35 in keyboard.rb

  type = key[:text] ? "keyDown" : "rawKeyDown"

========================================
/usr/local/bundle/gems/ferrum-0.11/lib/ferrum/keyboard.rb:42:in `up': no implicit conversion of Array into Hash (TypeError)
It rises in this code:
browser.keyboard.up(:pagedown)
any other key including "a" raises the same error
this is line 42 in keyboard.rb

  @page.command("Input.dispatchKeyEvent", slowmoable: true, type: "keyUp", **key)

works only 'type' method. 'up' and 'down' raises an error.

Did i miss something?

[route]

Yea looks broken, I created a PR #288