feat!: MAJOR release. Update go to 1.25, and add migration path (#520)

BREAKING CHANGE: This bumps Go and external packages to later versions.

lua/gitlab/async.lua

@@ -63,8 +63,7 @@ M.sequence = function(dependencies, cb)
     end
 
     -- Otherwise, start the go server and start fetching the values
-    server.start(function()
-      state.go_server_running = true
+    server.build_and_start(function()
       handler:fetch(dependencies, 1, argTable)
     end)
   end