Merge pull request #721 from plotly/byronz-pr-template

Create pull_request_template.md

Author: byronz

.github/pull_request_template.md

@@ -0,0 +1,16 @@
+*Start with a description of this PR. Then edit the list below to the items that make sense for your PR scope, and check off the boxes as you go!*
+
+## Contributor Checklist
+
+- [ ] I have broken down my PR scope into the following TODO tasks
+   -  [ ] task 1
+   -  [ ] task 2
+- [ ] I have run the tests locally and they passed. (refer to testing section in [contributing](../CONTRIBUTING.md))
+- [ ] I have added tests, or extended existing tests, to cover any new features or bugs fixed in this PR
+
+### optionals
+
+- [ ] I have added entry in the `CHANGELOG.md`
+- [ ] If this PR needs a follow-up in **dash docs**, **community thread**, I have mentioned the relevant URLS as follow
+    -  [ ] this github [#PR number]() updates the dash docs
+    -  [ ] here is the show and tell thread in plotly dash community