Use new issue template format (#717)

This change makes use of the new issue template format.  The new YAML
version of the template allows for dropdowns and other form input metadata.

Author: ericwb

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -0,0 +1,84 @@
+name: "\U0001F41B Bug report"
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this bug report!
+
+  - type: textarea
+    id: describe-bug
+    attributes:
+      label: Describe the bug
+      description: A clear and concise description of what the bug is.
+      value: ""
+    validations:
+      required: true
+
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: To Reproduce
+      description: Steps to reproduce the behavior
+      value: |
+      1. Go to '...'
+      2. Click on '....'
+      3. Scroll down to '....'
+      4. See error"
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected-behavior
+    attributes:
+      label: Expected behavior
+      description: A clear and concise description of what you expected to happen.
+      value: ""
+    validations:
+      required: true
+
+  - type: dropdown
+    id: bandit-version
+    attributes:
+      label: Bandit version
+      description: Run "bandit --version" if unsure of version number
+      options:
+        - 1.7.0 (Default)
+        - 1.6.3
+        - 1.6.2
+        - 1.6.1
+        - 1.6.0
+        - 1.5.1
+        - 1.5.0
+        - 1.4.0
+        - 1.3.0
+        - 0.17.0-eol
+    validations:
+      required: true
+
+  - type: dropdown
+    id: python-version
+    attributes:
+      label: Python version
+      description: Run "bandit --version" if unsure of version number
+      options:
+        - 3.9 (Default)
+        - 3.8
+        - 3.7
+        - 3.6
+        - 3.5
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context
+      description: Add any other context about the problem here.
+      value: ""
+    validations:
+      required: true