Update gem description to include Rails 5.

[benpickles]

No description provided.

[fables-tales]

@myronmarston @JonRowe how do you feel about bumping to 3.5.1 for this and release?

[myronmarston]

I think it definitely makes sense to cherry-pick this to the 3-5-maintenance branch to be included in the next release, but it feels unnecessary to cut a release with just this. This doesn't affect any functionality, after all -- it's basically just a glorified comment.

[fables-tales]

@myronmarston that seems good. I'll do that :)

[fables-tales]

Closing in favour of #1654

[myronmarston]

@samphippen this commit should be included in master and 3-5-maintenance, so why not merge this one to get it in master? Usually we just cherry-pick the commits to the maint branch instead of opening another PR (unless we are concerned about it causing a failing build in the branch).

[fables-tales]

Ah right. Yes. Sorry, Misunderstood what you meant by cherry pick. I'll merge this one in now.

[fables-tales]

@benpickles thanks for this! it's now merged into all the relevant RSpec branches :)

[benpickles]

My pleasure.

Thanks for maintaining such a great library, it's nice to watch development in the open.