chore: update PR template (#250)

Author: vonovak

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,39 @@
+<!-- Thanks for submitting a pull request! We appreciate you spending the time to work on these changes. Please follow the template so that the reviewers can easily understand what the code changes affect -->
+
+# Summary
+
+<!--
+Explain the **motivation** for making this change: here are some points to help you:
+
+* What issues does the pull request solve? Please tag them so that they will get automatically closed once the PR is merged
+* What is the feature? (if applicable)
+* How did you implement the solution?
+* What areas of the library does it impact?
+-->
+
+## Test Plan
+
+<!-- Demonstrate the code is solid. Example: The exact commands you ran and their output, screenshots / videos if the pull request changes UI. -->
+
+### What's required for testing (prerequisites)?
+
+### What are the steps to reproduce (after prerequisites)?
+
+## Compatibility
+
+<!-- remove ✅ / ❌ to show what platforms this covers -->
+
+| OS      | Implemented |
+| ------- | :---------: |
+| iOS     |    ✅ ❌     |
+| Android |    ✅ ❌     |
+
+## Checklist
+
+<!-- Check completed item, when applicable, via: [X] -->
+
+- [ ] I have tested this on a device and a simulator
+- [ ] I added the documentation in `README.md`
+- [ ] I updated the typed files (TS and Flow)
+- [ ] I added a sample use of the API in the example project (`example/App.js`)
+- [ ] I have added automated tests, either in JS or e2e tests, as applicable