message: changelog: 1.3.8
diff: -TBD
  -===
  +1.3.8 (2020-05-28)
  +==================
  +This release contains a couple of important bug fixes driven
  +by better support for empty-subexpressions in regexes. For
  +example, regexes like `b|` are now allowed. Major thanks to
  +[@sliquister](https://github.com/sliquister) for implementing support for this
  +in [#677](https://github.com/rust-lang/regex/pull/677).
  Bug fixes:
  