Django-athm

Added
- Added `ATHM_Client` model and related logic
- Added `phonenumberslite` package for parsing phone numbers
Changed
- Change default value for `DJANGO_ATHM_SANDBOX_MODE` setting to `False`
- Upgraded underlying ATH Móvil API
- Added `async` to script tag for ATH Móvil script in base template
- Upgraded jquery in tests folder
Fixed
- Fix tox in Github Actions
- Fixed `athm_sync` command
- Remove pip cache in Github Actions

Changed
- Update packages
- Update pre-commit config
- Update README and LICENSE
- Use Github CI instead of TravisCI
- Fix deprecation warnings in test
- Use built-in pip caching in actions/setup-python

Changed

- Update packages
- Add testing for Django 3.2

Changed

- Update packages
- Improved coverage
- Add testing for Django 3.1
- Installed pytest-mock for testing

Fixed

- Fix model name in documentation

Removed
- Remove `DummyHTTPAdapter` class

Changed

- Updated packages
- Improved coverage

Added

- Setup tox multi-env testing
- Added classifiers to poetry config

Changed

- Specify minimum Django version (2.2)
- Cleaned up dev dependencies
- Updated docs

Added

- Sync management command
- Customizable checkout button