Revert "python3Packages.django_2: 2.2.20 -> 2.2.22"
Revert "python3Packages.django_2: 2.2.20 -> 2.2.22"

This reverts commit 3d905038750e7a3d151268f72442df6c650d4037.

This commit should have gone to staging first.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs