test: don't print the output of registry-mock

Author: zkochan

jest.globalSetup.js

@@ -2,5 +2,7 @@ const { start, prepare } = require('@pnpm/registry-mock')
 
 module.exports = () => {
   prepare()
-  global.__SERVER__ = start()
+  global.__SERVER__ = start({
+    stdio: 'ignore',
+  })
 }