Bump regex from 2020.1.8 to 2020.2.18
Bump regex from 2020.1.8 to 2020.2.18

Bumps [regex](https://bitbucket.org/mrabarnett/mrab-regex) from 2020.1.8 to 2020.2.18.
- [Commits](https://bitbucket.org/mrabarnett/mrab-regex/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
praekeltfoundation/debian-wheel-mirror