ci: add Windows to test matrix

[lread]

In support of #18.

We currently only run our tests on ubuntu.
I'll add Windows into the mix.
We can add macOS at some later date if we see some reason to do so.

I'll also review CI config and update as appropriate, for example:

• update outdated actions
• add Clojure 1.11 to matrix
• replace JDK 16 with JDK 17 in matrix

[lread]

I think that we can reasonably stop testing against Clojure 1.7 at this point.
Our jar references Clojure 1.8.0 which implies this our minimum Clojure version.

[borkdude]

@lread I suggest using neil add test for adding the cognitect test runner.

[borkdude]

Oh, wait, that's already been added.

[borkdude]

Yes, agreed on the above.

[lread]

Thanks for the feedback, it can get lonely sometimes! 🙂