Use chunked streams to read files

[badsyntax]

Richard, just a thing for the future to you think about it.
When I hash files, i create a fs.createReadStream(path) and do it on chunks, using .on('data', (data) => hash.update(data))
the thing is that on('error') i can handle it properly.
The most common error is while reading the file, the file gets deleted or changed.
So this is a common thing to do, handle the EBUSY when it happens

.on('error', (err) => {
        let endTime = new Date().getTime();
        const time = endTime - startTime;
        const seconds = time / 1000;
        if (err.message.indexOf('EBUSY') !== -1) {
          resolve({
            tipo: 'ERROR_EBUSY',
            timeSpent: seconds,
            path: path,
          });
        }

Originally posted by @leopucci in #32 (comment)