NodeJS not exiting after readline

Node JS process is not exiting after reading file via readline under Windows:

const readline = require('readline');
const fs = require('fs');
const rs = fs.createReadStream('../data/lorem.txt');
const rl = readline.createInterface({
    input: rs
});

rl.on('line', function(line) {
    console.log(line);
});

setTimeout(function () {
    rl.close();
    // tried these too:
    // rs.close();
    // rs.destroy();
},1000);

I don't want to use process.exit(0) because I am processing multiple files, and the fact that node is not exiting tells me that it is holding up some resources. How do I release them properly?

via amaksr