use spawn,sync and limit the return parameters

lib/cli/lib/npm_init.js

@@ -4,17 +4,16 @@ import hasYarn from './has_yarn';
 const packageManager = hasYarn() ? 'yarn' : 'npm';
 
 export default function npmInit() {
-  return new Promise((resolve, reject) => {
-    const command = spawn(packageManager, ['init', '-y'], {
+  const { status, signal, output, pid, stdout, stderr, error, ...rest } = spawn.sync(
+    packageManager,
+    ['init', '-y'],
+    {
       cwd: process.cwd(),
       env: process.env,
       stdio: 'pipe',
       encoding: 'utf-8',
       silent: true,
-    });
-
-    command.stdout.on('data', resolve);
-
-    command.stderr.on('data', reject);
-  });
+    }
+  );
+  return rest;
 }