Merge pull request #1186 from hotoo/pr-template

update(PR-template): better PULL-Request template format.

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,6 +2,6 @@ First of all, thanks for your contribution! :-)
 
 Please makes sure these boxes are checked before submitting your PR, thank you!
 
-[ ] Run `npm run lint` and fix those errors before submitting in order to keep consistent code style.
-[ ] Rebase before creating a PR to keep commit history clear.
-[ ] Add some descriptions and refer relative issues for you PR.
+* [ ] Run `npm run lint` and fix those errors before submitting in order to keep consistent code style.
+* [ ] Rebase before creating a PR to keep commit history clear.
+* [ ] Add some descriptions and refer relative issues for you PR.