chore: don't reasign MiniDeps.* in plugin definitions

lua/plugins/mini_notify.lua

@@ -1,6 +1,4 @@
-add, now, later = MiniDeps.add, MiniDeps.now, MiniDeps.later
-
-now(function()
+MiniDeps.now(function()
     require("mini.notify").setup()
     vim.notify = MiniNotify.make_notify()
 end)