const replace = require('replace-in-file');
const options = {
    files: './**/*.txt'
    from: /oneWord/g,
    to: 'anotherWord,

};

const replace = require('replace-in-file');
var from = '/'+ process.argv[3] + '/g';
const options = {
files: process.argv[2],
from: process.argv[3],
to: process.argv[4],

};