Log Message:
Update to 1.3.1. From the changelog:

- Fixed a bug introduced in v1.3.0 where the Postgres engine would
  always pass the port to `psql`, thus ignoring the `PGPORT` environment
  variable. Thanks to Cam Feenstra for the spot (#675)!
- Fixed test failures on OSes where the local time zone cannot be
  determined. Thanks to Slaven Rezić for the test reports, and to
  Dave Rolsky for the solution (#672).
- Updated the MySQL deploy/revert lock to be specific to the target
  database. This allows multiple instances of Sqitch to run at the
  same time on the same server as long as they're connecting to different
  databases. Thanks to Dmytro Kh for the report and discussion of the
  options (#670).
- Fixed test failures where DBD::Mem was not installed. Likely only
  occurred on some CPAN Testers nodes. Thanks to Slaven Rezić for those
  (#673).
- Banned the backslash character (`\`) in change and tag names. It would
  be ignored on Unix-style systems, but create unexpected subdirectories
  on Windows systems.
- Banned the slash character (`/`) in tag names. They're still allowed
  in change names to enable script organization, but can wreak havoc
  when used in tag names. Thanks to @ewie for the report (#680)!