Bump pip from 21.1.2 to 21.1.3 (PR #3069)

Bumps [pip](https://github.com/pypa/pip) from 21.1.2 to 21.1.3.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/pypa/pip/blob/main/NEWS.rst">pip's changelog</a>.</em></p>
<blockquote>
<h1>21.1.3 (2021-06-26)</h1>
<h2>Bug Fixes</h2>
<ul>
<li>Remove unused optional <code>tornado</code> import in vendored <code>tenacity</code> to prevent old versions of Tornado from breaking pip. (<code>[#10020](pypa/pip#10020) &lt;https://github.com/pypa/pip/issues/10020&gt;</code>_)</li>
<li>Require <code>setup.cfg</code>-only projects to be built via PEP 517, by requiring an explicit dependency on setuptools declared in pyproject.toml. (<code>[#10031](pypa/pip#10031) &lt;https://github.com/pypa/pip/issues/10031&gt;</code>_)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/pypa/pip/commit/e69a8f3987f44178dec8b9137158b4a6ed778ca3"><code>e69a8f3</code></a> Bump for release</li>
<li><a href="https://github.com/pypa/pip/commit/c141edc5c90d0e3c2f40635516f151e2d02b5d95"><code>c141edc</code></a> remove support for setup.cfg only projects</li>
<li><a href="https://github.com/pypa/pip/commit/363e90b62c3bfff14a4684545d54300007bb4d78"><code>363e90b</code></a> Avoid importing a non-vendored version of Tornado</li>
<li><a href="https://github.com/pypa/pip/commit/4cab55f48ef2d05da40dd603910a68f81523ddd4"><code>4cab55f</code></a> Rephrase the warning printed when run as root on Unix</li>
<li>See full diff in <a href="https://github.com/pypa/pip/compare/21.1.2...21.1.3">compare view</a></li>
</ul>
</details>
<br />

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changelogs/unreleased/3069-dependabot.yml

@@ -0,0 +1,5 @@
+change-type: patch
+description: Bump pip from 21.1.2 to 21.1.3
+destination-branches:
+- master
+sections: {}

requirements.txt

@@ -12,7 +12,7 @@ jinja2==3.0.1
 more-itertools==8.8.0
 netifaces==0.11.0
 packaging==20.9
-pip==21.1.2
+pip==21.1.3
 ply==3.11
 pydantic==1.8.2
 pyformance==0.4