Bailey

Add mdbook build and test steps

1

Related to https://github.com/iolivia/rust-sokoban/issues/13 The tests fail for `mdbook test`, I think maybe because of the included partials? I'm also not sure if we can make this more useful?

Add clippy linting

4

Relates to https://github.com/iolivia/rust-sokoban/issues/13

I don't think we can do smarter cache across the folders, because I think the jobs run in parallel. I think we could run them in a single job and...

Upgrade infer

2

Closes #2931 ### Checklist - [x] I read the [commit guidelines](http://coala.io/commit) and I've followed them. - [x] I ran coala over my code locally. (*All commits have to pass individually.*...

**What are you trying to accomplish with this PR?** The :eyes: and :runner: weren't rendering for me, for some strange reason. **How is this accomplished?** I tried doing some things...