Fixed #436 `WSGIRequest` has no attribute `sensitive_post_parameters`.

[danielmorell]

Description of the change

The sensitive_post_parameters attribute is not guarenteed to exist on the request object in Django. This PR resolves that issue, and also adds some logic that to account for the possible value "__ALL__". See...

https://github.com/django/django/blob/814e7bc22062eeae4be9f189e89027e28d5dd290/django/views/debug.py#L211

This PR also bumps the version of the beta release to v1.0.0b1.

Type of change

• [x] Bug fix (non-breaking change that fixes an issue)
• [ ] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Maintenance
• [x] New release

Related issues

• Fix #436

Checklists

Development

• [x] Lint rules pass locally
• [x] The code changed/added as part of this pull request has been covered with tests
• [x] All tests related to the changed code pass in development

Code review

• [ ] This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• [ ] "Ready for review" label attached to the PR and reviewers assigned
• [ ] Issue from task tracker has a link to this pull request
• [ ] Changes have been reviewed by at least one other engineer