5.2

• Implement copy_cluster method on ClusterableModel (Karl Hobley)
• Add formset_name option on ClusterableModel formsets to allow the formset name to differ from the relation name (Matt Westcott)
• Fix: Fix tests for Django 3.2 (Alex Tomkins, Matt Westcott, María Fernanda Magallanes)
• Fix: Ensure ptr_id fields are correctly populated when deserialising models with multi-level inheritance (Alex Tomkins)