Bump regex from 2019.05.25 to 2019.06.02
Bump regex from 2019.05.25 to 2019.06.02

Bumps [regex](https://bitbucket.org/mrabarnett/mrab-regex) from 2019.05.25 to 2019.06.02.
- [Commits](https://bitbucket.org/mrabarnett/mrab-regex/commits)
praekeltfoundation/debian-wheel-mirror