Merge branch 'update-zkapissuer' into 'develop'

Bump to PaymentServer 2022-01-17

See merge request privatestorage/PrivateStorageio!244

nixos/pkgs/zkapissuer/repo.json

-{
-  "owner": "PrivateStorageio",
-  "repo": "PaymentServer",
-  "rev": "e080beb14ec58ffe8e55c35e6dddd46c5082887f",
-  "branch": "main",
-  "outputHashAlgo": "sha256",
-  "outputHash": "1zck9kawbs2lkr3qjipira9gawa4gxlqijqqjrmlvvyp9mr0fgxm"
-}
+{
+  "owner": "PrivateStorageio",
+  "repo": "PaymentServer",
+  "rev": "47478f705332b23219285e9598a69668f2c79aa1",
+  "branch": "main",
+  "outputHashAlgo": "sha512",
+  "outputHash": "3z62dfkyivb0l8yc1l1qm31k8sl8i88m9pzrk9nhs42kmgcqyr7sa10lavj499w9l6zvh1628ss0g5pza5yaji537r1bc51qqfszydl"
+}
\ No newline at end of file