Update PR template

.github/pull_request_template.md

@@ -1,19 +1,46 @@
+## Description
+
 <!--
 Thanks for your contribution! Take a moment to answer these questions so that reviewers have the information they need to properly understand your changes:
 
 * What is the current state of things and why does it need to change?
 * What is the solution your changes offer and how does it work?
+* What packages are you updating?
+* Are you introducing a breaking change to a package (renaming or removing a part of a public interface)?
+-->
 
-Are there any issues or other links reviewers should consult to understand this pull request better? For instance:
+## Changes
 
-* Fixes #12345
-* See: #67890
+<!--
+Pretend that you're updating a changelog. How would you categorize your changes?
+
+CATEGORY is one of:
+
+- BREAKING
+- ADDED
+- CHANGED
+- DEPRECATED
+- REMOVED
+- FIXED
+
+(Security-related changes should go through the Security Advisory process.)
 -->
 
-## Examples
+- **<CATEGORY>**: Your change here
+- **<CATEGORY>**: Your change here
+- **<CATEGORY>**: Your change here
+
+## References
 
 <!--
-Are there any examples of this change being used in another repository?
+Are there any issues or other links that reviewers should consult to understand this pull request better? For instance:
 
-When considering changes to the MetaMask module template, it's strongly preferred that the change be experimented with in another repository first. This gives reviewers a better sense of how the change works, making it less likely the change will need to be reverted or adjusted later.
+* Fixes #12345
+* See: #67890
 -->
+
+## Checklist
+
+- [ ] I've updated the test suite for new or updated code as appropriate
+- [ ] I've updated documentation for new or updated code as appropriate (note: this will usually be JSDoc)
+- [ ] I've highlighted breaking changes using the "BREAKING" category above as appropriate