Merge branch 'update-nixpkgs' into 'develop'

Update nixpkgs.

See merge request !207

nixos/pkgs/privatestorage/repo.json

@@ -2,7 +2,7 @@
   "owner": "PrivateStorageio",
   "branch": "main",
   "repo": "ZKAPAuthorizer",
-  "rev": "c38c42362ac81dad25b4c5bcfe7a5cf0d49e1401",
+  "rev": "5bad3a39ae78cb2483d70709b8a7c1cba96571ab",
   "outputHashAlgo": "sha512",
-  "outputHash": "1pm44ihqn0m2zckmnzdxn7sj6v67m2kaqhpkpv9b48palyd8109ajh818aaj8rw6mlh2k9nrrza39khbqzh1910k8d6dk72ldqkqibl"
+  "outputHash": "1m277qsf8p94px33g7vbc18bjb48w35s8z2hbpnpga8mw21j1x9i0whnk7300byp9nx86vnk860bfmhbih4zdwprqnpflgvaciwdbwh"
 }

nixpkgs-2105.json

 {
   "name": "release2105",
-  "url": "https://releases.nixos.org/nixos/21.05/nixos-21.05.3916.3b1789322fc/nixexprs.tar.xz",
-  "sha256": "16czbb0kifzfxhg9g89d06csnfand7hjw829xbylbggmj9b8givq"
+  "url": "https://releases.nixos.org/nixos/21.05/nixos-21.05.3980.f0869b1a2c0/nixexprs.tar.xz",
+  "sha256": "0bcwqc01qmvzf4jllik11cvpl5x8nwk83lwh1ic7bzwr95k1iifm"
 }