More aggressive opam clean

Signed-off-by: Sora Morimoto <sora@morimoto.io>

Author: smorimoto

dist/index.js

@@ -209,6 +209,8 @@ export async function saveOpamCache() {
       "--download-cache",
       "--logs",
       "--repo-cache",
+      "--switch-cleanup",
+      "--untracked",
       "--unused-repositories",
     ]);
     const { key } = await composeOpamCacheKeys();