CI improvements

[mmastrac]

Post-1.0 we're going to need some CI improvements for the project:

• Finish adding more BSDs to the CI
• License lint check: ensure that each project has a copy of the licenses in its directory
• Release process via CI:
  • (optionally?) Use cargo publish to create a per-crate tag with the actual published content - tag would contain master branch with a commit that replaces tree w/published data for easier diffing.
  • Check that changelog for crate contains release date
  • Create a tag from the master branch
  • CI action that triggers a cargo publish from tag
  • Successful cargo publish triggers GH release
• semver checks on PR/push: if a crate or crate dependency changes, its version must be bumped to land a PR. In addition, changelog must contain a new entry for the new version.