Update bcrypt requirement from 4.1.3 to 4.2.0 in /backend (#841)

Updates the requirements on [bcrypt](https://github.com/pyca/bcrypt) to
permit the latest version.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/pyca/bcrypt/blob/main/release.py">bcrypt's
changelog</a>.</em></p>
<blockquote>
<h1>Licensed under the Apache License, Version 2.0 (the
&quot;License&quot;);</h1>
<h1>you may not use this file except in compliance with the
License.</h1>
<h1>You may obtain a copy of the License at</h1>
<h1></h1>
<h1><a
href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a></h1>
<h1></h1>
<h1>Unless required by applicable law or agreed to in writing,
software</h1>
<h1>distributed under the License is distributed on an &quot;AS IS&quot;
BASIS,</h1>
<h1>WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied.</h1>
<h1>See the License for the specific language governing permissions
and</h1>
<h1>limitations under the License.</h1>
<p>import subprocess</p>
<p>import click</p>
<p>def run(*args, **kwargs):
print(f&quot;[running] {list(args)}&quot;)
subprocess.check_call(list(args), **kwargs)</p>
<p><a href="https://github.com/click"><code>@​click</code></a>.command()
<a
href="https://github.com/click"><code>@​click</code></a>.argument(&quot;version&quot;)
def release(version):
&quot;&quot;&quot;
<code>version</code> should be a string like '0.4' or '1.0'.
&quot;&quot;&quot;
run(&quot;git&quot;, &quot;tag&quot;, &quot;-s&quot;, version,
&quot;-m&quot;, f&quot;{version} release&quot;)
run(&quot;git&quot;, &quot;push&quot;, &quot;--tags&quot;, &quot;<a
href="mailto:git@github.com">git@github.com</a>:pyca/bcrypt.git&quot;)</p>
<p>if <strong>name</strong> == &quot;<strong>main</strong>&quot;:
release()</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pyca/bcrypt/commit/8d0511149a2859ca949a481ad3a63844cdf9e565"><code>8d05111</code></a>
Bump version for 4.2.0 release (<a
href="https://redirect.github.com/pyca/bcrypt/issues/843">#843</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/884baedb543649b43fc0df4b7428657c35d28bfc"><code>884baed</code></a>
Import improvements from cryptography wheel building and release (<a
href="https://redirect.github.com/pyca/bcrypt/issues/840">#840</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/dd72470a4244403b50197e7b69a120ef449a60be"><code>dd72470</code></a>
Remove setup.py (<a
href="https://redirect.github.com/pyca/bcrypt/issues/842">#842</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/11961aff4d5dc6c45826749a4140d5c317322579"><code>11961af</code></a>
Small cleanup (<a
href="https://redirect.github.com/pyca/bcrypt/issues/841">#841</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/65e08f784578b3aa33b279826d0664bdfe4deea6"><code>65e08f7</code></a>
Added 3.13 to CI (<a
href="https://redirect.github.com/pyca/bcrypt/issues/839">#839</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/7efb8fa6cb0e528e721c81c9902c186d71b4cd7b"><code>7efb8fa</code></a>
Bump portable-atomic from 1.6.0 to 1.7.0 in /src/_bcrypt (<a
href="https://redirect.github.com/pyca/bcrypt/issues/836">#836</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/b1ec0341f979af0b712b4d7ba3e55f45e3b84679"><code>b1ec034</code></a>
Bump syn from 2.0.71 to 2.0.72 in /src/_bcrypt (<a
href="https://redirect.github.com/pyca/bcrypt/issues/837">#837</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/2e9cdc2db1ee571b056b430b0207b8dffea89169"><code>2e9cdc2</code></a>
Bump pyo3 from 0.22.1 to 0.22.2 in /src/_bcrypt (<a
href="https://redirect.github.com/pyca/bcrypt/issues/834">#834</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/d0047229087b78b95881bcbe19a3015bd22fde30"><code>d004722</code></a>
Bump syn from 2.0.70 to 2.0.71 in /src/_bcrypt (<a
href="https://redirect.github.com/pyca/bcrypt/issues/833">#833</a>)</li>
<li><a
href="https://github.com/pyca/bcrypt/commit/bb100162a5e3106bbae08b8d9d0a04e5e73f4045"><code>bb10016</code></a>
Bump actions/setup-python from 5.1.0 to 5.1.1 (<a
href="https://redirect.github.com/pyca/bcrypt/issues/832">#832</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/pyca/bcrypt/compare/4.1.3...4.2.0">compare
view</a></li>
</ul>
</details>
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backend/Pipfile

@@ -9,7 +9,7 @@ types-aiofiles = ">=23.2.0.0"
 aiohttp = ">=3.8.3"
 aiopg = ">=1.4.0"
 alembic = ">=1.13.1"
-bcrypt = "4.1.3"
+bcrypt = "4.2.0"
 click = ">=8.1.3"
 databases = {extras = ["asyncpg"], version = "<=0.8.0"}
 fastapi = ">=0.88.0"