message: changelog: 1.3.1
diff: +1.3.1 (2019-09-04)
  +==================
  +This is a maintenance release with no changes in order to try to work-around
  +a [docs.rs/Cargo issue](https://github.com/rust-lang/docs.rs/issues/400).
  +
  +
  1.3.0 (2019-09-03)
  ==================
  This release adds a plethora of new crate features that permit users of regex
  