Bug report

This file should live at .github/ISSUE_TEMPLATES/bug_report.md.

## Describe the bug

A clear and concise description of what the bug is.

## To reproduce

Steps to reproduce the behavior:

> Ex.
>
> 1. Install pystac
> 2. Run `scripts/test`
> 3. See error

Include OS, Python version, and PySTAC version.

## Expected behavior

A clear and concise description of what you expected to happen.

## Screenshots and shell session dumps

If applicable, add session dumps and/or screenshots to help explain your problem.

> ex. `scripts/lint >> lint_errors.txt`

## Additional context

Add any other context about the problem here.

## Issue Checklist

- [ ] OS, Python version, PySTAC version are included.
- [ ] Existing issues were reviewed to prevent duplicate submission.