chore: format everything

This implicates a change from nixpkgs-fmt to nixfmt. Nixfmt will become
the new standard on nix formatting, sanctioned by the nixpkgs. To verify
that these changes are purely in whitespace, but not semantic:

git diff --ignore-all-space -w HEAD^!

That will only show newline changes, make the diffing somewhat easier.

Signed-off-by: wucke13 <wucke13+github@gmail.com>

pkgs/package-deb.nix

@@ -1,4 +1,8 @@
-{ runCommand, dpkg, rosenpass }:
+{
+  runCommand,
+  dpkg,
+  rosenpass,
+}:
 
 let
   inherit (rosenpass) version;