add pull request template (#11)

Author: golanglibs

pull_request_template.md

@@ -0,0 +1,8 @@
+## Description
+
+## Issue Link
+
+## Checklist
+- [ ] I have prefixed the title of this PR with one of the following: [feature] [bugfix] [minor] [refactor] [doc]
+- [ ] If the PR is a feature, bugfix, minor or refactor, I have added thorough tests
+- [ ] I have updated documentation both in code and README.md