Fix migrations with dependencies failing if run by themselves#10461

Merged

nanaya merged 3 commits intoppy:masterfrom cl8n:fix-dependent-migrations

Aug 15, 2023

+106-97

Commits on Aug 14, 2023

Use new migration format for migrations that are depended on
cl8n
committed
Require migration dependencies instead of assuming class will be declared
cl8n
committed

Commits on Aug 15, 2023

Simpler migration() implementation
cl8n
committed