pull_request_template.md

What kind of change does this PR introduce?

• [] Bug fix (non-breaking change which fixes an issue)
• [] New feature (non-breaking change which adds functionality)
• [] Breaking change (fix or feature that would cause existing functionality to change)

Issue/feature/bug description:

Checklist before requesting a review

• [] I have performed a self-review of my code.
• [] I have refactored my code before this push.
• [] The commit message follows our guidelines.
• [] My code follows the code style of this project.