add bug report template

Author: rvowles

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,27 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Expected behavior**
+A clear and concise description of what problem is occurring.
+
+**To Reproduce** 
+Please insert a *fully formed OpenAPI YAML document* below
+describing your problem:
+
+
+**Versions**
+We only support bug fixes on the latest version of this plugin, please
+confirm which version you are using?
+
+
+**Additional context**
+Add any other context about the problem here.