add PR template

.github/pull_request_template.md

@@ -0,0 +1,30 @@
+Reviewer:
+
+Estimate:
+
+---
+
+### Goal
+
+### Changes
+
+## How has this been tested?
+
+## To-do before merge
+
+(Optional -- remove this section if not needed)
+
+- [ ] Ensure PR #56 is merged
+
+## Checklist
+
+Fill with `x` for completed. Delete any lines that are not relevant
+
+- [ ] My code follows the style guidelines of this project
+- [ ] I have reviewed my own code to ensure good quality
+- [ ] I have tested the functionality of my code to ensure it works as intended
+- [ ] I have resolved merge conflicts
+- [ ] I have updated the automated tests (if applicable)
+- [ ] I have updated the requirements (if applicable)
+- [ ] I have updated the README file (if applicable)
+- [ ] I have updated affected documentation (if applicable)