review CI

[YeungOnion]

Since it's been some time, let us ensure that our CI is as useful as we need it to be.

A few ideas I think would be useful beyond running our tests,

• running clippy
• generally fail on rustc warnings
• dependabot
• cross-platform

[FreezyLemon]

I've recently set up CI workflows for some other Rust projects, so I could take a look at this if you're not working on it already.

Do you want a job running for all three major platforms (windows, macos, linux)? AFAICT, the project doesn't really have any platform-specific code. On the other hand, it's not that hard to set up..

[YeungOnion]

I think that'd be great, thanks!

One thing to mention: I'd like to also have a way to run the tests that rely on the NIST dataset we were using while still excluding the data from the repo (see #195)

[YeungOnion]

• running clippy
• generally fail on rustc warnings
• dependabot
• cross-platform

clippy, fail on warn, and cross-platform by @FreezyLemon in #215
dependabot by @YeungOnion in #238