Tests

Fixes bug/feature in GitHub action upload-artifact that ignores any file that starts with a dot. #276

Job	Run time
Tests / Prepare Python/Django matrix	15s
Tests / Python 3.8 - Django 3.2.*	38s
Tests / Python 3.8 - Django 4.1.*	40s
Tests / Python 3.8 - Django 4.2.*	46s
Tests / Python 3.9 - Django 3.2.*	43s
Tests / Python 3.9 - Django 4.1.*	50s
Tests / Python 3.9 - Django 4.2.*	44s
Tests / Python 3.10 - Django 3.2.*	42s
Tests / Python 3.10 - Django 4.1.*	37s
Tests / Python 3.10 - Django 4.2.*	47s
Tests / Python 3.10 - Django 5.0.*	40s
Tests / Python 3.10 - Django 5.1.*	44s
Tests / Python 3.10 - Django main	50s
Tests / Python 3.11 - Django 3.2.*	36s
Tests / Python 3.11 - Django 4.1.*	41s
Tests / Python 3.11 - Django 4.2.*	32s
Tests / Python 3.11 - Django 5.0.*	38s
Tests / Python 3.11 - Django 5.1.*	32s
Tests / Python 3.11 - Django main	50s
Tests / Python 3.12 - Django 3.2.*	44s
Tests / Python 3.12 - Django 4.1.*	46s
Tests / Python 3.12 - Django 4.2.*	44s
Tests / Python 3.12 - Django 5.0.*	50s
Tests / Python 3.12 - Django 5.1.*	42s
Tests / Python 3.12 - Django main	54s
Tests / coverage	23s
	17m 48s

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