Implement '/meta'

[pcasaretto]

Hey guys,

Learning go and currently using go-octokit as a dependency for another project.
I wanted to contribute back and also scratch my own itch :) .
Opening this PR with WIP to get early feedback.
The code currently works.

Some specific questions on the code itself.

Thanks!

[pcasaretto]

is One a good name for this function?

[pengwynn]

Thanks for checking. One isn't a great fit here, is it? Wondering if we should forgo the service and just have client.Meta return an ApiInfo struct? Thoughts?

[brodock]

@pengwynn can you please provide some feedback here? We are implementing other missing pieces and would like to know if you are interested in more PRs.

[pengwynn]

@pcasaretto @brodock: My apologies, I was on vacation when this landed. Was buried in my ⭐ folder.

I left some feedback. Thanks for the patch!

[pcasaretto]

Thanks for the feedback @pengwynn. Tried to incorporate all of it in the most recent commit.
Apart from the obvious error cases, should I focus on any specific test cases?

[pcasaretto]

I was a little confused if I should accept a *url.URL, a *Hyperlink, or nothing at all here.

[pengwynn]

I think this looks good.

[pcasaretto]

I've added tests for the basic cases, but there is lack of coverage where the IPs and IPNets get parsed.
Do you think it's important to test that?
I did try but I could't stub the request on the same test and had to add two different json fixtures. I figured it wasn't worth the trouble.

[pengwynn]

I've added tests for the basic cases, but there is lack of coverage where the IPs and IPNets get parsed.
Do you think it's important to test that?

I think this is fine for now. Thanks for the patch. 🍰