tools(deps-dev): Update icanhazstring/composer-unused requirement from 0.8.11 to 0.9.0 in /tools/composer-unused (#516)

Updates the requirements on
[icanhazstring/composer-unused](https://github.com/composer-unused/composer-unused)
to permit the latest version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/composer-unused/composer-unused/releases">icanhazstring/composer-unused's
releases</a>.</em></p>
<blockquote>
<h2>0.9.0</h2>
<h2>What's Changed</h2>
<ul>
<li>chore(deps): require composer-unused/symbol-parser v0.2.2 by <a
href="https://github.com/simPod"><code>@​simPod</code></a> in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/605">composer-unused/composer-unused#605</a></li>
<li>Sort results of <code>debug:provided-symbols</code> command by <a
href="https://github.com/llaville"><code>@​llaville</code></a> in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/626">composer-unused/composer-unused#626</a></li>
<li>Display package processing on right side of progress bar (in verbose
mode) by <a
href="https://github.com/llaville"><code>@​llaville</code></a> in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/632">composer-unused/composer-unused#632</a></li>
<li>Add support to PHP-Parser v5 by <a
href="https://github.com/llaville"><code>@​llaville</code></a> in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/628">composer-unused/composer-unused#628</a></li>
<li>Drop Symfony 4 support by <a
href="https://github.com/llaville"><code>@​llaville</code></a> in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/634">composer-unused/composer-unused#634</a></li>
<li>Add --output-file option to directly write formatted result output
to… by <a href="https://github.com/temp"><code>@​temp</code></a> in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/629">composer-unused/composer-unused#629</a></li>
<li>Update to PHP 8.4 by <a
href="https://github.com/bobvandevijver"><code>@​bobvandevijver</code></a>
in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/668">composer-unused/composer-unused#668</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/temp"><code>@​temp</code></a> made their
first contribution in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/629">composer-unused/composer-unused#629</a></li>
<li><a
href="https://github.com/bobvandevijver"><code>@​bobvandevijver</code></a>
made their first contribution in <a
href="https://redirect.github.com/composer-unused/composer-unused/pull/668">composer-unused/composer-unused#668</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/composer-unused/composer-unused/compare/0.8.11...0.9.0">https://github.com/composer-unused/composer-unused/compare/0.8.11...0.9.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/a9056906e2184ad87748b104de53b062d3da3b9e"><code>a905690</code></a>
chore: Update dependencies</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/ba75c3203fe3edf7001289463e753db53862343d"><code>ba75c32</code></a>
feat: Whitelist php8.3 and 8.4 polyfill for box builds</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/be80fbdd2fe4988144fb5375eb51bc6c4d0af530"><code>be80fbd</code></a>
feat: Add php8.4 and 8.3 dockerfile</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/124d440de570d401653a97d1abe77fad1855ffb5"><code>124d440</code></a>
Remove plugin update job</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/d8c00b8540795996426c22cdac2e6e8b6e0f4e67"><code>d8c00b8</code></a>
Build PHAR with PHP 8.4</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/a81ef2bd07146430ed55848ef6f5260f0a027721"><code>a81ef2b</code></a>
Drop support for nikic/php-parser 4</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/2754fa8c1114a94c94797341185b46482b21a537"><code>2754fa8</code></a>
Drop phar compactor as it breaks attributes</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/ea788938fb966d4aae59b23ac73c08e2f0ffa734"><code>ea78893</code></a>
Use composer install instead of update</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/e88d463c3c61bfe68d66ce5e905d0713e6f836b1"><code>e88d463</code></a>
Run composer update</li>
<li><a
href="https://github.com/composer-unused/composer-unused/commit/2a4c4eebc7f8e5a8dbe565729ac5b7a699a57047"><code>2a4c4ee</code></a>
Add workflow_dispatch to validate code action</li>
<li>Additional commits viewable in <a
href="https://github.com/composer-unused/composer-unused/compare/0.8.11...0.9.0">compare
view</a></li>
</ul>
</details>
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tools/composer-unused/composer.json

@@ -6,7 +6,7 @@
         "php": "^8.1.31"
     },
     "require-dev": {
-        "icanhazstring/composer-unused": "0.8.11",
+        "icanhazstring/composer-unused": "0.9.0",
         "roave/security-advisories": "dev-latest"
     },
     "prefer-stable": true,