Create a checklist that should be completed for every version bump PR

RELEASE_CHECKLIST.md

@@ -0,0 +1,11 @@
+# Release Checklist
+
+Copy this file into your PR to make a new release!
+
+- [ ] Bump the version in `Cargo.toml`
+- [ ] Update the example source code embedded in the website
+- [ ] Update all the WASM binary examples for the website
+- [ ] Verify, on each major platform, that all examples work correctly
+- [ ] Update the html_root_url in `src/lib.rs`
+- [ ] Ensure *all* dependencies are up-to-date
+- [ ] Ensure there are no bugs this release *opens* (not fixing a bug is acceptable, releasing a version with new known bugs is not)