Add pull request template (#192)

Author: RTLcoil

.github/pull_request_template.md

@@ -0,0 +1,29 @@
+### Brief Summary of Changes
+<!-- Provide some context as to what was changed, from an implementation standpoint. -->
+
+#### What does this PR address?
+- [ ] GitHub issue (Add reference - #XX)
+- [ ] Refactoring
+- [ ] New feature
+- [ ] Bug fix
+- [ ] Adds more tests
+
+#### Are tests included?
+- [ ] Yes
+- [ ] No
+
+#### Reviewer, please note:
+<!--
+List anything here that the reviewer should pay special attention to. This might
+include, for example:
+* Dependence on other PRs
+* Reference to other Cloudinary SDKs
+* Changes that seem arbitrary without further explanations
+-->
+
+#### Checklist:
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+- [ ] My code follows the code style of this project.
+- [ ] My change requires a change to the documentation.
+- [ ] I ran the full test suite before pushing the changes and all of the tests pass.