Feature Request: Xit() to Exclude Test

[dan9186]

I saw issue #56 has been around for a while with the comment of not having time to add it, and noticed #60 came up recently. Thought I would take a stab at adding it.

• Adds Itable interface for variations of It
• Adds Xit struct and methods
• Adds Yellow fancier for excluded outputs
• Adds excluded output to reports
• Updates README.md to include new functionality

[marcosnils]

One minor comment in tests, otherwise LGTM!.

[marcosnils]

It'd be nice to also assert that count is still 0 in the end.

[dan9186]

Good idea. Added an extra check for making sure count is not altered.

[marcosnils]

Thanks a lot for the contribution @dan9186 . We'll move the images to static hosting soon :)

[jayd3e]

Why was Xit chosen instead of something like Ignore, @dan9186? It strikes me as far less clear.

[dan9186]

With a conversation already existing where the project owner expressed acceptance of Xit and the project's goal of matching behavior to Mocha, I opted for what seemed to be most inline with those two points.

[jayd3e]

Those reasons make sense! Thanks for the explanation. Already using this feature 👌 . Thanks!