fix: get deps by name

lua/sloth-flake/init.lua

@@ -33,7 +33,7 @@ function M.dep_names()
 end
 
 function M.dep_names_by(fn)
-  return M.deps_iter_by(fn):map(function(v) return v:name() end)
+  return M.deps_iter_by(fn):map(function(v) return v.name end)
 end
 
 function M.deps_iter_by(fn)