Switch to pyproject.toml packaging, using hatchling.
- Replace all uses of setup.py with updated equivalent
- BREAKING: Change extra name `amazon_ses` to
`amazon-ses`, to comply with Python packaging
name normalization
- Use hatch custom build hook to freeze version number
in readme (previously custom setup.py code)
- Move separate requirements for dev, docs, tests
into their own requirements.txt files
- Fix AnymailImproperlyInstalled to correctly refer
to package extra name
- Update testing documentation
- Update docs readme rendering to match PyPI
(and avoid setup.py)
- In tox tests, use isolated builds and update pip
- Remove AUTHORS.txt (it just referred to GitHub)
Minimum supported versions are now Django 2.0, Python 3.5.
This touches a lot of code, to:
* Remove obsolete portability code and workarounds
(six, backports of email parsers, test utils, etc.)
* Use Python 3 syntax (class defs, raise ... from, etc.)
* Correct inheritance for mixin classes
* Fix outdated docs content and links
* Suppress Python 3 "unclosed SSLSocket" ResourceWarnings
that are beyond our control (in integration tests due to boto3,
python-sparkpost)
* Add vertical space between items in "open" lists
(rtfd/sphinx_rtd_theme#590)
* Distinguish shell prompts in console examples,
and omit them if the code is copied
* Add css and js extras directly from Sphinx conf.py
(no need to override template)
