GH actions: add check for missing migrations (and fix migrations) #961
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Closes #959 and adds a GH action check via Django's
makemigrations --check
to prevent it happening again (you can see the failing check here).I also "fixed" the missing migration by just modifying the original migration instead of creating a new one (instead of #960) since this specific
Model.Meta
change doesn't affect the SQL schema this should be safe to do and thus doesn't require users to run new migrations in the next release.There was also a missing migration in the test suite, I just created that since I didn't want to dig into that change too much and that migration wouldn't affect end users of this library.