Kleides-mfa

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* Only import otp models that are installed

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* Fix device_id url component converter
* Update test project for warnings

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* Deprecate KLEIDES_MFA_PATCH_ADMIN for custom AdminConfig app
* Add decorators and mixins for recent authentication checks
* Refactor app settings to enable override_settings
* Include jquery qrcode javascript
* Run ValidationService migration on routed database

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* Add signals to act on adding/removing MFA devices.
* Fix compatibility with Django-4.0.
* Update test matrix for supported releases only.
* Make device table responsive.

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* Update bootstrap, jquery and popper script tags.

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* Prevent single factor access to device list when multi factor is
available.
* Switch to setuptools_scm for automatic git versioning.
* Move package data to setup.cfg.
* Add Python 3.9 and Django 3.2 to the support matrix.
* Remove Python 3.5 and Django 3.0 which are end of life.
* Move test dependencies to the kleides-mfa[test] extra.
* Switch to PEP517 package builder.