PULL_REQUEST_TEMPLATE

## Description

<!--- Describe your changes in detail -->

Fixes: <!--- add all relevant GiHub issues this fixes -->

## How Has This Been Tested?

<!--- Please describe how you tested your changes. -->

[ ] Have the unit tests for the package passed in your environment?
[ ] If appropriate, have the regression tests affected by your code change passed?

## Screenshots (if appropriate):

<!--- This section can be deleted if it is not appropriate for the PR or repo -->