fix: make template_loader consider tuples for STATICFILES_DIRS

[alexandreMartinEcl]

fixes #476

Hoping to fix issue here

I suggested to use logger.warning and simply not to consider the STATICFILES_DIR value if the value is incorrect. But depends on your preference.

[JuroOravec]

@alexandreMartinEcl Looks good to me! I pushed one fix for a typing error.

One thing that remains - the tests fail for Python 3.8-3.10 somewhere around where we've added MagicMock or @patch()

See logs https://github.com/EmilStenstrom/django-components/actions/runs/8990294238/job/24695481406?pr=489

[alexandreMartinEcl]

Indeed older version of python does not seem to appreciate my way to mock. It returns
'django_components.logger' is not a package on @patch("django_components.logger.logger.warning")

I'm trying another way, but did not find a quick way to test on python3.8

HAve you maybe also experienced a difficulty with mocking on old versions of python ?

edit : I spoke too fast, just found about pyenv in the readme

[JuroOravec]

@alexandreMartinEcl Thanks again, tests have been fixed, so I've merged it :) It is now avaiable in https://github.com/EmilStenstrom/django-components/releases/tag/0.73