This used to be a polyfill for require('child_process').spawnSync but now all actively maintained node versions already support spawnSync, so this is just a stub that re-exports spawnSync.
You should remove this library from your dependencies and just do:
varspawnSync=require('child_process').spawnSync;varresult=spawnSync('node',['filename.js'],{input: 'write this to stdin'});if(result.status!==0){process.stderr.write(result.stderr);process.exit(result.status);}else{process.stdout.write(result.stdout);process.stderr.write(result.stderr);}MIT