doc:update PULL_REQUEST_TEMPLATE.md. (#282)

.github/PULL_REQUEST_TEMPLATE.md

@@ -10,17 +10,19 @@ Other... Please describe:
 
 ## Describe what this PR does for and how you did.
 
+## Adding the issue link (#xxx) if possible.
 
-## Does this PR be associated with issue? If so, please adding the issue link below.
+## Note
 
+## Checklist
 
-## Note
+- [ ] Add copyright holder at the beginning of .class file if it is new.
+- [ ] Add information of this PR to CHANGELOG.md in root of project.
+- [ ] All junit tests passing.
+- [ ] Coverage from `Codecov Report` should not decrease.
 
+## Checklist (Optional)
 
-### Checklist
+- [ ] Will Pull Request to branch of 2020.0 and 2021.0.
-- [ ] Code compiles correctly
+- [ ] Add documentation in javadoc in code or comment below the PR if necessary.
-- [ ] Pull Request has submit to 2020.0 and Greenwich
+- [ ] Add your name as @author to the beginning of .class file.
-- [ ] Create at least one junit test if possible
-- [ ] All tests passing
-- [ ] Extend documentation if necessary
-- [ ] Add myself / the copyright holder to the AUTHORS file