Mergify initial configuration

[mergify]

This is an initial configuration for Mergify.

This pull request will require one reviewer approval.

Those required status checks have been discovered from the 5 more recent pull requests of your project:

continuous-integration/styleci

More information about Mergify configuration can be found at https://doc.mergify.io

To modify this pull request, you can check it out locally.
See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/