⬆️ Bump exhale from 0.3.4 to 0.3.5 (#40)

Bumps [exhale](https://github.com/svenevs/exhale) from 0.3.4 to 0.3.5.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/svenevs/exhale/releases">exhale's
releases</a>.</em></p>
<blockquote>
<h2>v0.3.5</h2>
<p>See <a
href="https://exhale.readthedocs.io/en/latest/changelog.html#v0-3-5">changelog
for v0.3.5</a>.</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/svenevs/exhale/blob/master/docs/changelog.rst">exhale's
changelog</a>.</em></p>
<blockquote>
<h2>v0.3.5</h2>
<ul>
<li>Fix a bug (:issue:<code>171</code>) where some generated pages are
missing a blank line (before
the heading markup, after the backlink to the parent directory)
resulting in warnings
from sphinx (:pr:<code>172</code>).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/svenevs/exhale/commit/98a28d0a65da27803029eecd91a9a940cc0c80cb"><code>98a28d0</code></a>
v0.3.5</li>
<li><a
href="https://github.com/svenevs/exhale/commit/f612c091c55bd70aba9680d7670b370873cfa54b"><code>f612c09</code></a>
Guarantee a newline always follows |exhale_lsh| backlinks (<a
href="https://github-redirect.dependabot.com/svenevs/exhale/issues/172">#172</a>)</li>
<li><a
href="https://github.com/svenevs/exhale/commit/09ea0931f877efc3c6b3c5f620593f2e4f204c19"><code>09ea093</code></a>
v0.3.5 dev version bump</li>
<li>See full diff in <a
href="https://github.com/svenevs/exhale/compare/v0.3.4...v0.3.5">compare
view</a></li>
</ul>
</details>
<br />


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</details>

requirements.txt

@@ -62,7 +62,7 @@ entrypoints==0.4
     # via jupyter-client
 executing==1.0.0
     # via stack-data
-exhale==0.3.4
+exhale==0.3.5
     # via -r requirements.in
 fastjsonschema==2.16.2
     # via nbformat