Update bug report templates

Author: lemontree55

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,28 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+## Environment
+
+* [ ] Ruby version:
+* [ ] rasn1 version:
+
+## Description
+A clear and concise description of what the bug is.
+
+## Expected behavior
+What should happen?
+
+## Actual behavior
+What really happened
+
+## Suggested fix
+Not mandatory, but suggest a fix or reason for the bug
+
+## Code to reproduce
+Provide code or a link to code to reproduce this bug.