Bump sass from 1.85.1 to 1.86.0 (plfa#1105)

Bumps [sass](https://github.com/sass/dart-sass) from 1.85.1 to 1.86.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/sass/dart-sass/releases">sass's
releases</a>.</em></p>
<blockquote>
<h2>Dart Sass 1.86.0</h2>
<p>To install Sass 1.86.0, download one of the packages below and <a
href="https://katiek2.github.io/path-doc/">add it to your PATH</a>, or
see <a href="https://sass-lang.com/install">the Sass website</a> for
full installation instructions.</p>
<h1>Changes</h1>
<ul>
<li>
<p>Add support for <code>%</code> as an expression in its own right. It
will still be parsed as the modulo operator when between two other
expressions, but in any other context it will be an expression whose
value is the unquoted string <code>%</code>.</p>
</li>
<li>
<p>Consider <code>attr()</code> to be a special number function that can
be used as a channel in color functions.</p>
</li>
<li>
<p>Deprecate user-defined functions named <code>type()</code> so that we
can eventually support the new CSS <code>type()</code> function.</p>
</li>
</ul>
<h3>Dart API</h3>
<ul>
<li>Increase the minimum Dart SDK to 3.6.0.</li>
</ul>
<p>See the <a
href="https://github.com/sass/dart-sass/blob/master/CHANGELOG.md#1860">full
changelog</a> for changes in earlier releases.</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/sass/dart-sass/blob/main/CHANGELOG.md">sass's
changelog</a>.</em></p>
<blockquote>
<h2>1.86.0</h2>
<ul>
<li>
<p>Add support for <code>%</code> as an expression in its own right. It
will still be parsed
as the modulo operator when between two other expressions, but in any
other
context it will be an expression whose value is the unquoted string
<code>%</code>.</p>
</li>
<li>
<p>Consider <code>attr()</code> to be a special number function that can
be used as a
channel in color functions.</p>
</li>
<li>
<p>Deprecate user-defined functions named <code>type()</code> so that we
can eventually
support the new CSS <code>type()</code> function.</p>
</li>
</ul>
<h3>Dart API</h3>
<ul>
<li>Increase the minimum Dart SDK to 3.6.0.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/sass/dart-sass/commit/c6706e719cdaa5c5497b54bdb0a7fbf8ebb0b7ed"><code>c6706e7</code></a>
Add support for <code>%</code> as a stand-alone expression (<a
href="https://redirect.github.com/sass/dart-sass/issues/2540">#2540</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/3ddbb38cf82642a94d9881a402f0278cb9740820"><code>3ddbb38</code></a>
Bump typedoc from 0.27.9 to 0.28.0 in /pkg/sass-parser (<a
href="https://redirect.github.com/sass/dart-sass/issues/2546">#2546</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/e6589fe2c368715a987679194f7a4bbdea1eec68"><code>e6589fe</code></a>
Add support for parsing variable expressions (<a
href="https://redirect.github.com/sass/dart-sass/issues/2541">#2541</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/2680d5fc6aab326508734d9912401bd5aa13e96a"><code>2680d5f</code></a>
Add support for parsing unary operations (<a
href="https://redirect.github.com/sass/dart-sass/issues/2538">#2538</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/734e9de5a3884e195a4b3ddecdd163bc336de3bd"><code>734e9de</code></a>
Use union types rather than base classes for Sass nodes (<a
href="https://redirect.github.com/sass/dart-sass/issues/2537">#2537</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/0d3ea25562de0135a70260d389c85e88c992c894"><code>0d3ea25</code></a>
Add support for the supports() function (<a
href="https://redirect.github.com/sass/dart-sass/issues/2535">#2535</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/ddd4b23611aaa351580926327bd89fd45c16bc47"><code>ddd4b23</code></a>
Add support for parsing selector expressions (<a
href="https://redirect.github.com/sass/dart-sass/issues/2533">#2533</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/d067c3a0dd77a614494be90d8e4b6f03dcc340a9"><code>d067c3a</code></a>
Add support for parsing parenthesized expressions (<a
href="https://redirect.github.com/sass/dart-sass/issues/2527">#2527</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/2e59f14b21ea54c0cde355fd9424847b961d7990"><code>2e59f14</code></a>
Bump analyzer from 6.11.0 to 7.3.0 (<a
href="https://redirect.github.com/sass/dart-sass/issues/2532">#2532</a>)</li>
<li><a
href="https://github.com/sass/dart-sass/commit/8e411a2380eada5998526e40b4fe9a3cce122ed8"><code>8e411a2</code></a>
Use thread-safe writeln from dart sdk &gt;=3.6.0 (<a
href="https://redirect.github.com/sass/dart-sass/issues/2528">#2528</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/sass/dart-sass/compare/1.85.1...1.86.0">compare
view</a></li>
</ul>
</details>
<br />

<details>
<summary>Most Recent Ignore Conditions Applied to This Pull
Request</summary>

| Dependency Name | Ignore Conditions |
| --- | --- |
| sass | [< 1.55, > 1.54.0] |
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package-lock.json

@@ -3,6 +3,6 @@
     "browser-sync": "^3.0.3",
     "html-validate": "^8.11.1",
     "html-minifier": "^4.0.0",
-    "sass": "^1.85.1"
+    "sass": "^1.86.0"
   }
 }