Bump cryptography from 2.9.2 to 3.4.3

Bumps cryptography from 2.9.2 to 3.4.3.
Changelog
Sourced from cryptography's changelog.
3.4.3 - 2021-02-08
* Specify our supported Rust version (>=1.45.0) in our ``setup.py`` so users on older versions will get a clear error message. .. _v3-4-2:
3.4.2 - 2021-02-08
Improvements to make the rust transition a bit easier. This includes some better error messages and small dependency fixes. If you experience installation problems Be sure to update pip first, then check the :doc:FAQ </faq>.
.. _v3-4-1:
3.4.1 - 2021-02-07

* Fixed a circular import issue.
* Added additional debug output to assist users seeing installation errors
  due to outdated ``pip`` or missing ``rustc``.
.. _v3-4:
3.4 - 2021-02-07

* **BACKWARDS INCOMPATIBLE:** Support for Python 2 has been removed.
* We now ship ``manylinux2014`` wheels and no longer ship ``manylinux1``
  wheels. Users should upgrade to the latest ``pip`` to ensure this doesn't
  cause issues downloading wheels on their platform.
* ``cryptography`` now incorporates Rust code. Users building ``cryptography``
  themselves will need to have the Rust toolchain installed. Users who use an
  officially produced wheel will not need to make any changes. The minimum
  supported Rust version is 1.45.0.
* ``cryptography`` now has :pep:`484` type hints on nearly all of of its public
  APIs. Users can begin using them to type check their code with ``mypy``.

.. _v3-3-2:

3.3.2 - 2021-02-07
</code></pre>
<ul>
<li><strong>SECURITY ISSUE:</strong> Fixed a bug where certain sequences of <code>update()</code> calls
when symmetrically encrypting very large payloads (&gt;2GB) could result in an
integer overflow, leading to buffer overflows. <em>CVE-2020-36242</em></li>
</ul>
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</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>

<ul>
<li><a href="https://github.com/pyca/cryptography/commit/86c9e4a763579d6b2369db83064c0c4b8e9c1c77"><code>86c9e4a</code></a> version bump, changelog already done (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5791">#5791</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/0f40cb3acb66014d2872010ae3ba00dd16157d01"><code>0f40cb3</code></a> [3.4] Specify an MSRV in setup.py (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5789">#5789</a>) (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5790">#5790</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/74a3df42c43d341014a4a6f111804f304a446902"><code>74a3df4</code></a> 3.4.2 changelog and version bump (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5784">#5784</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/4a66e2bdde25535d236338d8af84595c78562673"><code>4a66e2b</code></a> [3.4] More aggressively point people at Rust version docs (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5782">#5782</a>) (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5783">#5783</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/843ada65e816a17e1b3d90b12ab6403c8ff96654"><code>843ada6</code></a> Remove setuptools_rust from install requirement (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5779">#5779</a>) (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5781">#5781</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/e5b5c3d4486a4a9b5c457ef7ba147ca893a5a57c"><code>e5b5c3d</code></a> Interface: Make annotation check optional (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5775">#5775</a>) (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5780">#5780</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/ebde3be7ef92658bfbc322476a6f2604f41639fb"><code>ebde3be</code></a> 3.4.1 fixes and changelog bump (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5761">#5761</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/2c11ad53c07179e03ea2f60813cb52d83f766292"><code>2c11ad5</code></a> 3.4 release (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5749">#5749</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/06cbf77371881e80ea4b5e349136dcc53749fc0c"><code>06cbf77</code></a> port changelog and fix back to master for CVE-2020-36242 (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5748">#5748</a>)</li>
<li><a href="https://github.com/pyca/cryptography/commit/9d1669534f95d276412fe224f5a9c413a814f759"><code>9d16695</code></a> Linker script is no longer required for building your own OpenSSL (<a href="https://github-redirect.dependabot.com/pyca/cryptography/issues/5746">#5746</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/pyca/cryptography/compare/2.9.2...3.4.3">compare view</a></li>
</ul>
</details>

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UKHSA-Internal / coronavirus-dashboard-api-v1

Bump cryptography from 2.9.2 to 3.4.3 #13
