title: ERROR: Twisted-20.3.0-cp38-cp38-win_amd64.whl is not a supported wheel on this platform
body: <p>Python 3.8.3, Scrapy 2.2.0 and Twisted-20.3.0-cp38-cp38-win_amd64.whl are installed on my computer. Everything works as expected.
  I can’t install Scrapy without Twisted, so Twisted is also installed, but when I try to transfer the application to Heroku, an error appears. How do I use Scrapy on Heroku?</p>
  <pre>-----&gt; Found python-3.6.10, removing
  -----&gt; Requirements file has been changed, clearing cached dependencies
  -----&gt; Installing python-3.8.3
  -----&gt; Installing pip
  -----&gt; Installing SQLite3
  -----&gt; Installing requirements with pip
         ERROR: Twisted-20.3.0-cp38-cp38-win_amd64.whl is not a supported wheel on this platform.
   !     Push rejected, failed to compile Python app.
   !     Push failed```
  </pre>