feat(emojify template) Make PR template 100% emoji

✨✨ This makes this PR 💯/💯 ✨✨

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,12 @@
-Make sure these boxes are checked!
+Make sure these boxes are checked! 📦✅
 
-- [ ] You have the latest version of `rustfmt` installed
+- [ ] You have the latest version of `rustfmt` installed and have your 
+      cloned directory set to nightly
+```bash
+$ rustup override set nightly
+$ rustup component add rustfmt-preview --toolchain nightly
+```
 - [ ] You ran `rustfmt` on the code base before submitting
 - [ ] You reference which issue is being closed in the PR text
+
+✨✨ 😄 Thanks so much for contributing to wasm-pack! 😄 ✨✨