Add PR template

Closes: #3
Signed-off-by: Michael Gasch <mgasch@vmware.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,42 @@
+## Description
+
+Please include a summary of the change and which issue is fixed. Please also
+include relevant motivation and context. List any dependencies that are required
+for this change.
+
+Closes: #(issue-number)
+
+## Type of change
+
+Please mark options that are relevant:
+
+- [ ] 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
+  not work as expected)
+- [ ] This change requires a documentation update
+
+## How Has This Been Tested?
+
+Please describe the tests that you ran to verify your changes. Provide
+instructions so we can reproduce. If applicable, please also list any relevant
+details for your test configuration.
+
+- [ ] Test Description 1
+- [ ] Test Description 2
+
+**Test Configuration**:
+* Toolchain:
+* SDK:
+* (add more if needed)
+
+## Checklist:
+
+- [ ] My code follows the contribution
+  [guidelines](https://github.com/cloudevents/sdk-powershell/blob/main/CONTRIBUTING.md)
+  of this project
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+- [ ] Any dependent changes have been merged and published in downstream modules