Merge pull request #141 from multiformats/pr-template

Create pull_request_template.md

Author: MarcoPolo

.github/pull_request_template.md

@@ -0,0 +1,7 @@
+## Summary
+<!-- What's the change? -->
+
+## Before Merge
+<!-- Anything that's needed before we merge this? -->
+- [ ] Allow at least 24 hours for community input
+- [ ] If this is a new protocol, has the change been applied to https://github.com/multiformats/multicodec as well? If so, please link the multicodec PR.