mods: add updateScript and tests.version

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

pkgs/tools/misc/mods/default.nix

@@ -1,6 +1,9 @@
 { lib
 , buildGoModule
 , fetchFromGitHub
+, gitUpdater
+, testers
+, mods
 }:
 
 buildGoModule rec {
@@ -18,6 +21,17 @@ buildGoModule rec {
 
   ldflags = [ "-s" "-w" "-X=main.version=${version}" ];
 
+  passthru = {
+    updateScript = gitUpdater {
+      rev-prefix = "v";
+      ignoredVersions = ".(rc|beta).*";
+    };
+
+    tests.version = testers.testVersion {
+      package = mods;
+    };
+  };
+
   meta = with lib; {
     description = "AI on the command line";
     homepage = "https://github.com/charmbracelet/mods";