Initial release with binaries

Because of its use of nightly features, pbqff can be difficult to compile without a very recent Rust compiler (#282). This was a good excuse to figure out more about GitHub releases and find the action-gh-release action to automate uploading binaries. This release provides binaries for the x86_64-unknown-linux-musl, aarch64-apple-darwin, and x86_64-apple-darwin targets.