Auto merge of #27721 - servo:dependabot/cargo/syn-1.0.48, r=jdm
Auto merge of #27721 - servo:dependabot/cargo/syn-1.0.48, r=jdm

Bump syn from 1.0.38 to 1.0.48

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.38 to 1.0.48.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/dtolnay/syn/releases">syn's releases</a>.</em></p>
<blockquote>
<h2>1.0.46</h2>
<ul>
<li>Fix parsing structured attributes that contain nested absolute paths, such as <code>#[derive(::serde::Serialize)]</code> (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/909">#909</a>)</li>
</ul>
<h2>1.0.45</h2>
<ul>
<li>Provide more detailed error messages when parsing specific literal kind (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/908">#908</a>)</li>
</ul>
<h2>1.0.44</h2>
<ul>
<li>Fix some parsing of patterns inside of None-delimited groups (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/907">#907</a>)</li>
</ul>
<h2>1.0.43</h2>
<ul>
<li>Add Parse impl for syn::Signature</li>
</ul>
<h2>1.0.42</h2>
<ul>
<li>Fix several bugs involving unusual suffixes on integer and floating point literal tokens (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/898">#898</a>, <a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/899">#899</a>, <a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/900">#900</a>)</li>
</ul>
<h2>1.0.41</h2>
<ul>
<li>Fix panic on printing an incomplete (having fewer path segments than originally parsed with) qualified path (ExprPath, PatPath, TypePath containing QSelf) (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/891">#891</a>, thanks <a href="https://github.com/taiki-e">@taiki-e</a>)</li>
<li>Fix panic triggered by syntactically invalid overflowing negative float literal after <code>.</code> in a field access position, e.g. <code>let _ = obj.-0.9E999999</code> (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/895">#895</a>, thanks <a href="https://github.com/sameer">@sameer</a>)</li>
<li>Enable using <code>parse_macro_input!</code> with a Parser function rather than type having a Parse impl (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/896">#896</a>, thanks <a href="https://github.com/sbrocket">@sbrocket</a>)</li>
</ul>
<h2>1.0.40</h2>
<ul>
<li>Fix panic on parsing float literals having both an exponent and a suffix beginning with 'e' or 'E', such as <code>9e99e999</code> (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/893">#893</a>)</li>
</ul>
<h2>1.0.39</h2>
<ul>
<li>Improve compile time by pre-expanding derives (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/885">#885</a>)</li>
<li>Parse const generic parameters in any order relative to type parameters (<a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/886">#886</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/dtolnay/syn/commit/1c8ec7953893310c0ff10cbe27567846a0541187"><code>1c8ec79</code></a> Release 1.0.48</li>
<li><a href="https://github.com/dtolnay/syn/commit/b7953dfafcf13705282c9741efacdd9f9eeaa3ee"><code>b7953df</code></a> Release 1.0.47</li>
<li><a href="https://github.com/dtolnay/syn/commit/301a74eae7267807956ea3b0b9bdf9a7986b7be0"><code>301a74e</code></a> Unpin crossbeam-utils since they released fix</li>
<li><a href="https://github.com/dtolnay/syn/commit/8f0dbd5050a99d166cf13e4c0d6a8274df484bd8"><code>8f0dbd5</code></a> Update syn-internal-codegen deps</li>
<li><a href="https://github.com/dtolnay/syn/commit/45acd3ad3a5381fb41de2a026c96cba3de994ca0"><code>45acd3a</code></a> Set html_root_url for syn-codegen crate</li>
<li><a href="https://github.com/dtolnay/syn/commit/39ee8cc18812397826a947e6a0300154a5530395"><code>39ee8cc</code></a> Release syn-codegen 0.2.0</li>
<li><a href="https://github.com/dtolnay/syn/commit/ab2c642edd1f6d272ba26d86517e9ef1ddde3070"><code>ab2c642</code></a> Update syn-codegen to semver 0.11</li>
<li><a href="https://github.com/dtolnay/syn/commit/f1f86306dc15c1319bdc03d5b5c832a1d4ec9aff"><code>f1f8630</code></a> Expand wildcard import</li>
<li><a href="https://github.com/dtolnay/syn/commit/ce86fcecf3825fa6e1c7fddd1b7005678889ca89"><code>ce86fce</code></a> Format syn-internal-codegen with rustfmt 1.4.22-nightly</li>
<li><a href="https://github.com/dtolnay/syn/commit/2804a84e0f3b31c8fab9f5174d83ce15028c957f"><code>2804a84</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/dtolnay/syn/issues/912">#912</a> from dtolnay/tokendoc</li>
<li>Additional commits viewable in <a href="https://github.com/dtolnay/syn/compare/1.0.38...1.0.48">compare view</a></li>
</ul>
</details>
<br />

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