message: changelog: 1.5.4
diff: +1.5.4 (2021-05-06)
  +==================
  +This release fixes another compilation failure when building regex. This time,
  +the fix is for when the `pattern` feature is enabled, which only works on
  +nightly Rust. CI has been updated to test this case.
  +
  +* [BUG #772](https://github.com/rust-lang/regex/pull/772):
  + Fix build when `pattern` feature is enabled.
  +
  +
  1.5.3 (2021-05-01)
  ==================
  This releases fixes a bug when building regex with only the `unicode-perl`
  