PULL_REQUEST_TEMPLATE.md

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

The PR fulfills these requirements:

• It's submitted to the develop branch(or to a previous version branch), not the master branch
• All tests are passing
• Build success

If adding a new feature, the PR's description includes:

• A convincing reason for adding this feature

Other information: