Create pull_request_template.md

Add checklist for description of a pull request

Author: ssinhaleite

pull_request_template.md

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+## Checklist before requesting a review
+- [ ] Tests for the changes have been added (for bug fixes/features)
+- [ ] Docs have been added / updated (for bug fixes / features)
+- [ ] I have performed a self-review of my code
+- [ ] Will this be part of a product update? If yes, please write one line about this on the CHANGELOG.md
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+
+* **What kind of change does this PR introduce?** (Bug fix, feature, docs update, ...)
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+
+* **What is the current behavior?** (You can also link to an open issue here)
+
+
+* **What is the new behavior (if this is a feature change)?**
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+
+* **Does this PR introduce a breaking change?** (What changes might users need to make in their application due to this PR?)
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+* **Other information**: