Content-type mismatch of POST data

[Brandon Wood]

It looks like the Content-Type of POST data is currently set to application/x-www-form-urlencoded, even though the data are encoded as JSON.

I might be missing a nuance of the GitHub API, but should we consider changing this to application/json instead to match?

[Brandon Wood]

By the way, I will gladly file a PR to fix this and #22, but I don't want dig in until PR #19 gets merged @cenkalti, what do you think?

[Brandon Wood]

So I ended up just adding this to PR #19, along with #22, since I had time 😸

[Cenk Altı]

👍