DOC update news, make 0.20 link to 0.20.0
</li>
<li><strong>Scikit-learn 0.21 will drop support for Python 2.7 and Python 3.4.</strong>
</li>
- <li><em>September 2018.</em> scikit-learn 0.20 is available for download (<a href="whats_new.html#version-0-20">Changelog</a>).
+ <li><em>November 2018.</em> scikit-learn 0.20.1 is available for download (<a href="whats_new.html#version-0-20-1">Changelog</a>).
+ </li>
+ <li><em>September 2018.</em> scikit-learn 0.20.0 is available for download (<a href="whats_new.html#version-0-20-0">Changelog</a>).
</li>
<li><em>July 2018.</em> scikit-learn 0.19.2 is available for download (<a href="whats_new.html#version-0-19">Changelog</a>).
</li>
