⬆️ Bump fastjsonschema from 2.18.0 to 2.18.1 (#479)

Bumps
[fastjsonschema](https://github.com/horejsek/python-fastjsonschema) from
2.18.0 to 2.18.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/horejsek/python-fastjsonschema/blob/master/CHANGELOG.txt">fastjsonschema's
changelog</a>.</em></p>
<blockquote>
<p>=== 2.18.1 (2023-10-01)</p>
<ul>
<li>Lazy import of urllib to improve import performance</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/horejsek/python-fastjsonschema/commit/b0645bfdae940a2fef72868aeda98abec7dc6466"><code>b0645bf</code></a>
v2.18.1</li>
<li><a
href="https://github.com/horejsek/python-fastjsonschema/commit/b5e5a88b009497d0fe2949e3c32765558aee8c7d"><code>b5e5a88</code></a>
Merge pull request <a
href="https://redirect.github.com/horejsek/python-fastjsonschema/issues/174">#174</a>
from danielhollas/faster-import</li>
<li><a
href="https://github.com/horejsek/python-fastjsonschema/commit/b8b954f1dd19a6cd5d8cad78cb7adc3493faec1e"><code>b8b954f</code></a>
Lazy import urllib.request</li>
<li><a
href="https://github.com/horejsek/python-fastjsonschema/commit/ffd99876e234b658d898505a1093a60146e4f5b7"><code>ffd9987</code></a>
Revert &quot;Lazy import urllib&quot;</li>
<li><a
href="https://github.com/horejsek/python-fastjsonschema/commit/a20f297b69fa9a14ee470077f702639fa69557e7"><code>a20f297</code></a>
Lazy import urllib</li>
<li>See full diff in <a
href="https://github.com/horejsek/python-fastjsonschema/compare/v2.18.0...v2.18.1">compare
view</a></li>
</ul>
</details>
<br />


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</details>

requirements.txt

@@ -65,7 +65,7 @@ executing==1.2.0
  # via stack-data
 exhale==0.3.6
  # via -r requirements.in
-fastjsonschema==2.18.0
+fastjsonschema==2.18.1
  # via nbformat
 filelock==3.12.4
  # via virtualenv