Finalize status information

[mgwidmann]

So I set out to try to automatically take a screenshot on scenario failure, but it doesn't seem like its possible to know that information on scenario_failure of if it was successful or not.

So this PR adds the following capability:

scenario_finalize fn
  {:ok, _scenario}, _state ->
        Hound.end_session
  {:error, _reason, scenario}, _state ->
    Hound.Helpers.Screenshot.take_screenshot("#{scenario.name |> String.downcase() |> String.replace(~r/\W/, "-")}-failure.png")
    Hound.end_session
end

Its backwards compatible allowing the regular single parameter function to still work as it does today.

[meadsteve]

I like this a lot 👍 Thanks for taking the time to add this. I've got no feedback at all on the PR so I'll merge and release some time today.

[meadsteve]

I was hoping to backport this to the 2.x branch but at the moment it doesn't seem worth the effort so I'm going to push on and get a version of 3.x ready soon and release this patch as part of that.

[mgwidmann]

👍 awesome thanks!