Update slim requirement from ~> 5.1.0 to ~> 5.2.0 (#478)

Updates the requirements on
[slim](https://github.com/slim-template/slim) to permit the latest
version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/slim-template/slim/releases">slim's
releases</a>.</em></p>
<blockquote>
<h2>v5.2.0</h2>
<ul>
<li>Fix logic less bug - <a
href="https://redirect.github.com/slim-template/slim/issues/783">#783</a></li>
<li>Support Rails 7.1 - <a
href="https://redirect.github.com/slim-template/slim/issues/936">#936</a></li>
<li>Fix splat arguments on Rails 7.1 - <a
href="https://redirect.github.com/slim-template/slim/issues/942">#942</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/slim-template/slim/blob/main/CHANGES">slim's
changelog</a>.</em></p>
<blockquote>
<p>5.2.0 (2023-11-11)</p>
<ul>
<li>Fix logic less bug - <a
href="https://redirect.github.com/slim-template/slim/issues/783">#783</a></li>
<li>Support Rails 7.1 - <a
href="https://redirect.github.com/slim-template/slim/issues/936">#936</a></li>
<li>Fix splat arguments on Rails 7.1 - <a
href="https://redirect.github.com/slim-template/slim/issues/942">#942</a></li>
</ul>
<p>5.1.1 (2023-05-16)</p>
<ul>
<li>Support lambda functions as shortcuts - <a
href="https://redirect.github.com/slim-template/slim/issues/677">#677</a>
<a
href="https://redirect.github.com/slim-template/slim/issues/813">#813</a>
<a
href="https://redirect.github.com/slim-template/slim/issues/903">#903</a></li>
<li>Support --enable-frozen-string-literal - <a
href="https://redirect.github.com/slim-template/slim/issues/851">#851</a></li>
</ul>
<p>5.1.0 (2023-03-06)</p>
<ul>
<li>Allow whitespace markers for verbatim text: <code>|&lt;</code>,
<code>|&gt;</code>, and <code>|&lt;&gt;</code> - <a
href="https://redirect.github.com/slim-template/slim/issues/912">#912</a></li>
<li>Do not swallow single quote after output line indicator - <a
href="https://redirect.github.com/slim-template/slim/issues/911">#911</a></li>
<li>Support Tilt 2.1.0 - <a
href="https://redirect.github.com/slim-template/slim/issues/910">#910</a></li>
<li>Fix Railtie load error - <a
href="https://redirect.github.com/slim-template/slim/issues/904">#904</a></li>
<li>Fix attribute parsing with square brackets - <a
href="https://redirect.github.com/slim-template/slim/issues/796">#796</a></li>
</ul>
<p>5.0.0 (2023-01-23)</p>
<ul>
<li>Fix markdown interpolation <a
href="https://redirect.github.com/slim-template/slim/issues/773">#773</a></li>
<li>Support case/in <a
href="https://redirect.github.com/slim-template/slim/issues/884">#884</a></li>
<li>Extract slim/railtie <a
href="https://redirect.github.com/slim-template/slim/issues/850">#850</a></li>
<li>css: doesn't add type='text/css' anymore <a
href="https://redirect.github.com/slim-template/slim/issues/828">#828</a></li>
<li>Remove deprecated whitespace syntax =' etc</li>
<li>Add support for annotate_rendered_view_with_filenames <a
href="https://redirect.github.com/slim-template/slim/issues/867">#867</a>,
<a
href="https://redirect.github.com/slim-template/slim/issues/878">#878</a>,
<a
href="https://redirect.github.com/slim-template/slim/issues/901">#901</a></li>
<li>Remove deprecated syntax</li>
<li>Add option to hyphenate underscore attributes - <a
href="https://redirect.github.com/slim-template/slim/issues/852">#852</a></li>
<li>Update CI/CD testing and dependencies</li>
</ul>
<p>4.1.0 (2020-05-07)</p>
<ul>
<li>Add support for Tailwind CSS - <a
href="https://redirect.github.com/slim-template/slim/issues/841">#841</a></li>
<li>Update dependencies and testing</li>
</ul>
<p>4.0.1 (2018-09-02)</p>
<ul>
<li>Fix incompatibility issue with Slim Include plugin and new ability
to specifiy attributes for embedded engines <a
href="https://redirect.github.com/slim-template/slim/issues/819">#819</a></li>
</ul>
<p>4.0.0 (2018-08-26)</p>
<ul>
<li>Add ability to specify attributes for embedded engines using
TagEngine - <a
href="https://redirect.github.com/slim-template/slim/issues/653">#653</a></li>
<li>Set Tilt's default encoding to utf-8 - <a
href="https://redirect.github.com/slim-template/slim/issues/800">#800</a></li>
<li>Prevent generation of invalid Ruby code in heredoc - <a
href="https://redirect.github.com/slim-template/slim/issues/770">#770</a></li>
<li>Don't convert underscores to dashes on data attributes - <a
href="https://redirect.github.com/slim-template/slim/issues/807">#807</a>
[Backward incompatible]</li>
<li>Update description in README.jp.md - <a
href="https://redirect.github.com/slim-template/slim/issues/795">#795</a></li>
<li>Removed support for embedded engines: Asciidoc, Builder, Creole,
Erb, Nokogiri, Opal, Org-Ruby, Styl, Wikicloth</li>
<li>Fix tests</li>
</ul>
<p>3.0.9 (2017-11-09)</p>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/slim-template/slim/commit/6d3fd5e7fd40359a6e1444b73a0bed4d0c8c840b"><code>6d3fd5e</code></a>
Version 5.2.0</li>
<li><a
href="https://github.com/slim-template/slim/commit/a40187c4ff372ea732047fe400d04de54eb68b14"><code>a40187c</code></a>
CI: Update Rails versions</li>
<li><a
href="https://github.com/slim-template/slim/commit/03492f3f50ae3c8f30586aab7d8a8c41ff584b71"><code>03492f3</code></a>
Fix Slim::Splat::Builder</li>
<li><a
href="https://github.com/slim-template/slim/commit/5f4f6253d6ccd3a011e7b64505c00e6cef83350f"><code>5f4f625</code></a>
Update changes</li>
<li><a
href="https://github.com/slim-template/slim/commit/956d40b3dc34d0cd166efa78dd84aef1f50db316"><code>956d40b</code></a>
Slim::Splat::Builder - Convert value to string</li>
<li><a
href="https://github.com/slim-template/slim/commit/832e9f6ae25e6b5afe9b7a6c04372dee25ebd455"><code>832e9f6</code></a>
Revert &quot;CI test.yml: Cleanup names&quot;</li>
<li><a
href="https://github.com/slim-template/slim/commit/e71ec75daa66ecec872d6393c62e2cb6a844996d"><code>e71ec75</code></a>
Fix splat arguments on Rails 7.1 (<a
href="https://redirect.github.com/slim-template/slim/issues/942">#942</a>)</li>
<li><a
href="https://github.com/slim-template/slim/commit/8193222ae57bcd2c20c7171b6557d1198dbf251b"><code>8193222</code></a>
CI test.yml: Cleanup names</li>
<li><a
href="https://github.com/slim-template/slim/commit/9cbd4f4fc5af17f38fc480bc6e65b21831d71323"><code>9cbd4f4</code></a>
CI: name individual run steps (<a
href="https://redirect.github.com/slim-template/slim/issues/939">#939</a>)</li>
<li><a
href="https://github.com/slim-template/slim/commit/54b1b0964750293747b7485c67e23186f8dd7e21"><code>54b1b09</code></a>
CI: Add Rails 7.1.0 to test.yml (<a
href="https://redirect.github.com/slim-template/slim/issues/936">#936</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/slim-template/slim/compare/v5.1.0...v5.2.0">compare
view</a></li>
</ul>
</details>
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</details>

govuk-components.gemspec

@@ -43,7 +43,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency("rubypants", "~> 0.7.0")
   spec.add_development_dependency("sass")
   spec.add_development_dependency("sassc", "~> 2.4.0")
-  spec.add_development_dependency("slim", "~> 5.1.0")
+  spec.add_development_dependency("slim", "~> 5.2.0")
   spec.add_development_dependency("slim_lint", "~> 0.24.0")
   spec.add_development_dependency("webrick", "~> 1.8.1")
 end