v0.7.1 — Correctness, security, and quality fixes

Release v0.6.0 — Fix citation ref → refs, extension schema tests, CI …

…feature matrix

Bump version to 0.5.0 (#92)

Marks the first release with full spec conformance testing (78/79 PASS).
Adds SECURITY.md declaring only 0.5.x as supported.

Merge pull request #83 from Entrolution/fix/publish-auth-token

Pass crates.io auth token to cargo publish steps