Create PULL_REQUEST_TEMPLATE.md

Author: faceleg

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,7 @@
+<!--
+Note that leaving sections blank will make it difficult for us to troubleshoot and we may have to close the issue.
+-->
+
+**What issue is this PR resolving? Alternatively, please describe the bugfix/enhancement this PR aims to provide**
+
+**Have you provided unit tests that either prove the bugfix or cover the enhancement?**