Merge #427

427: build(deps): bump virtualenv from 20.8.1 to 20.10.0 r=ChrisRBe a=dependabot[bot]

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.8.1 to 20.10.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst">virtualenv's changelog</a>.</em></p>
<blockquote>
<h1>Release History</h1>
<p>.. include:: _draft.rst</p>
<p>.. towncrier release notes start</p>
<h2>v20.9.0 (2021-10-23)</h2>
<p>Features - 20.9.0</p>
<pre><code>- Special-case ``--prompt .`` to the name of the current directory - by :user:`rkm`. (`[#2220](pypa/virtualenv#2220) &lt;https://github.com/pypa/virtualenv/issues/2220&gt;`_)
- Add libffi-8.dll to pypy windows `[#2218](pypa/virtualenv#2218) &lt;https://github.com/pypa/virtualenv/issues/2218&gt;`_ - by :user:`mattip`
<p>Bugfixes - 20.9.0
</code></pre></p>
<ul>
<li>Fixed path collision that could lead to a PermissionError or writing to system
directories when using PyPy3.8 - by :user:<code>mgorny</code>. (<code>[#2182](pypa/virtualenv#2182) &lt;https://github.com/pypa/virtualenv/issues/2182&gt;</code>_)</li>
<li>Upgrade embedded setuptools to <code>58.3.0</code> from <code>58.1.0</code> and pip to <code>21.3.1</code> from <code>21.2.4</code> - by
:user:<code>gaborbernat</code>. (<code>[#2205](pypa/virtualenv#2205) &lt;https://github.com/pypa/virtualenv/issues/2205&gt;</code>_)</li>
<li>Remove stray closing parenthesis in activate.bat - by :user:<code>SiggyBar</code>. (<code>[#2221](pypa/virtualenv#2221) &lt;https://github.com/pypa/virtualenv/issues/2221&gt;</code>_)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/pypa/virtualenv/commit/2f4e2668a4f70047549a5c8b146ac75143367538"><code>2f4e266</code></a> release 20.10.0</li>
<li><a href="https://github.com/pypa/virtualenv/commit/15c09d6e0c1eb11c18918ef67590e5291fd361f0"><code>15c09d6</code></a> ?? prompt should be wrapped in paranthesis ?? (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2224">#2224</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/8da79db86d8a5c74d03667a40e64ff832076445e"><code>8da79db</code></a> Favor the &quot;venv&quot; sysconfig install scheme over the default and distutils sche...</li>
<li><a href="https://github.com/pypa/virtualenv/commit/31f39137544bfea32c475f4a99473900a2995144"><code>31f3913</code></a> Fix broken prompt set up by activate.bat (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2225">#2225</a>) (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2226">#2226</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/653d4ebcaae635183e95fba40a8bf3592ec3647e"><code>653d4eb</code></a> Fix docs</li>
<li><a href="https://github.com/pypa/virtualenv/commit/a13e51e69080a5a5a5a15630f4a0f7b3d97d1c9a"><code>a13e51e</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2223">#2223</a> from pypa/release-20.9.0</li>
<li><a href="https://github.com/pypa/virtualenv/commit/35d6a19dad02c5b9d4f700f3aaf9cbecb284cbb6"><code>35d6a19</code></a> release 20.9.0</li>
<li><a href="https://github.com/pypa/virtualenv/commit/4a1328b8f764683bffe860cd34ab0510f6e790d7"><code>4a1328b</code></a> Bump pip and setuptools (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2222">#2222</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/6bfc29e1a3d621e3f622a0d0395ff261ce0f3973"><code>6bfc29e</code></a> special-case <code>--prompt .</code> to the cwd (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2220">#2220</a>)</li>
<li><a href="https://github.com/pypa/virtualenv/commit/4188ac6e72d3b731595c83d46d1c0eb76fe4f6eb"><code>4188ac6</code></a> Support PyPy 3.8 (<a href="https://github-redirect.dependabot.com/pypa/virtualenv/issues/2206">#2206</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/pypa/virtualenv/compare/20.8.1...20.10.0">compare view</a></li>
</ul>
</details>
<br />


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requirements.txt

@@ -40,5 +40,5 @@ toml==0.10.2
 typed-ast==1.4.3
 typing-extensions==3.10.0.2
 urllib3==1.26.7
-virtualenv==20.8.1
+virtualenv==20.10.0
 wrapt==1.13.3