Bump maxitest from 2.5.0 to 2.6.0
Bump maxitest from 2.5.0 to 2.6.0

Bumps [maxitest](https://github.com/grosser/maxitest) from 2.5.0 to 2.6.0.
- [Commits](https://github.com/grosser/maxitest/compare/v2.5.0...v2.6.0)
alphagov/whitehall,alphagov/whitehall,alphagov/whitehall,alphagov/whitehall