smtp4dev: fix updateScript

pkgs/by-name/sm/smtp4dev/package.nix

···
   npmHooks,
   fetchNpmDeps,
   dotnetCorePackages,
-  nix-update-script,
 }:
 
 buildDotnetModule (finalAttrs: {
···
     mv $out/bin/Rnwood.Smtp4dev $out/bin/smtp4dev
   '';
 
-  passthru.updateScript = nix-update-script {
-    extraArgs = [ "--version-regex=^(\\d+\\.\\d+\\.\\d+)$" ];
-  };
+  passthru.updateScript = ./update.sh;
 
   meta = {
     description = "Fake smtp email server for development and testing";

pkgs/by-name/sm/smtp4dev/update.sh

···
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl jq nix-update
+
+version=$(curl ${GITHUB_TOKEN:+-u ":$GITHUB_TOKEN"} -sfL "https://api.github.com/repos/rnwood/smtp4dev/releases/latest" | jq -r .tag_name)
+nix-update --version="$version" smtp4dev