title: npm pack doesn't include all files in the package
body: <p>I run <code>npm pack</code> inside <code>dist</code> folder, but it doesn't include all it's files.
  it just contains: package.json, ReADME.md, index.js (main).</p>
  
  <p>there is no <code>.gitignore</code> file, and I tried to create an empty <code>.npmignore</code> file, but it didn't help.</p>
  
  <p>I also tried to add <code>files</code> array to <code>package.json</code>.</p>
  
  <p>all files in the root or subfolders (js or other files) don't included in the pack file.</p>