Run unit tests under Miri #379
Description
There are a small-but-growing number of unit tests / doctests that can be run with cargo xtask test. It would be nice to have an xtask command to run the tests under Miri to help catch UB, and also add that to the CI.
See https://github.com/rust-lang/miri#running-miri-on-ci for some details of adding the miri component in CI (it's not available in every nightly release).