message: changelog: 1.5.5
  This adds the notes after the release, which were overlooked.
diff: +1.5.5 (2022-03-08)
  +==================
  +This releases fixes a security bug in the regex compiler. This bug permits a
  +vector for a denial-of-service attack in cases where the regex being compiled
  +is untrusted. There are no known problems where the regex is itself trusted,
  +including in cases of untrusted haystacks.
  +
  +* [SECURITY #GHSA-m5pq-gvj9-9vr8](https://github.com/rust-lang/regex/security/advisories/GHSA-m5pq-gvj9-9vr8):
  + Fixes a bug in the regex compiler where empty sub-expressions subverted the
  + existing mitigations in place to enforce a size limit on compiled regexes.
  + The Rust Security Response WG published an advisory about this:
  + https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw
  +
  +
  1.5.4 (2021-05-06)
  ==================
  This release fixes another compilation failure when building regex. This time,
  