Log Message:
py-prettytable: update 2.2.0.

Added:

- Add support for Python 3.10
- Update issue templates
- Add support for positional junction characters and add "double_border"
  table style
- Access properties instead of protected fields in _get_options()
- Use declarative metadata and support PyPy3
- Add auto index column

Changed:

- Refactor for readability and avoid merge conflicts
- Remove exclamation marks from exceptions