Context not returned for run_actions

[gruban]

When I use this example from the Readme:

actions = {
  :say => -> (session_id, context, msg) {
    p msg
  },
  :merge => -> (session_id, context, entities, msg) {
    return context
  },
  :error => -> (session_id, context, error) {
    p 'Oops I don\'t know what to do.'
  },
}

client = Wit.new access_token, actions
session = 'my-user-session-42'
context0 = ""
context1 = client.run_actions(session, 'what is the weather in London?', context0)
p "The session state is now: #{context1}"

Then the output is "The session state is now: "

It seems like the input context is always returned, not the output-context.

[patapizza]

Context should be a Hash.

I updated the code to throw an exception when it's not the case.