Cli2gui

- Fix https://github.com/FHPythonUtils/Cli2Gui/issues/7
- `catpandoc` is now optional https://github.com/FHPythonUtils/Cli2Gui/issues/5

2022 - 2022/01/24

- Bump pillow version (CVE-2022-22815, CVE-2022-22816, CVE-2022-22817)
- Update deps

- Use pre-commit to enforce reasonable standards + consistency
- Update readme with improved docs on installing and running python (fairly generic)
- Remove classifiers for license + python versions and rely on poetry to generate these
- Update tooling config (pyproject.toml)

- Use enum for parser + gui
- Use datatypes + typeddict...
- Add option for end user to select parser at runtime https://github.com/FHPythonUtils/Cli2Gui/issues/4
- Replace 'if' case/switch with function mappings

- reformat
- improve documentation
- typing improvements
- use relative imports
- update pyproject.toml

2021 - 2021/01/18

- Modelled the radio groups

- New Pillow release
- Typing fixes as recommended here https://github.com/microsoft/pylance-release/issues/485

- Added typing (drop py < 3.7)
- Update docstrings
- Update internal representation (tidy up)
- Use flavours for additional pysimplegui modules install `cli2gui[web]` and
`cli2gui[qt]` for the respective versions
- Modernize parts of the codebase (eg. decorators.py)
- Use camelCase for variables