Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,22 @@
+---
+name: Bug report
+about: Create a report to help us improve
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Versions (please complete the following information):**
+ - OS: [e.g. macos, Linux, Windows]
+ - Python [e.g. 3.6]
+ - HttpRunner [e.g. 1.5.11]
+
+**Traceback**
+Traceback when bug occurs.
+
+**Project file structure**
+File structure of your project. A good way is to run `tree` command.
+
+**Project files (If possible)**
+Provide your project files to help locate and debug bugs faster. This is not mandatory.