build(deps): Bump syn from 2.0.86 to 2.0.87 (#610)

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.86 to 2.0.87.
<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>2.0.87</h2>
<ul>
<li>Add <a
href="https://docs.rs/syn/2/syn/buffer/struct.Cursor.html#method.any_group"><code>Cursor::any_group</code></a>
(<a
href="https://redirect.github.com/dtolnay/syn/issues/1777">#1777</a>)</li>
<li>Add <a
href="https://docs.rs/syn/2/syn/enum.Expr.html#method.peek"><code>Expr::peek</code></a>
(<a
href="https://redirect.github.com/dtolnay/syn/issues/1778">#1778</a>)</li>
<li>Improve syntax support for enum discriminant expressions in
non-&quot;full&quot; mode (<a
href="https://redirect.github.com/dtolnay/syn/issues/1779">#1779</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/a777cff00528f270b43f40b0a58c5c26fc85a2bd"><code>a777cff</code></a>
Release 2.0.87</li>
<li><a
href="https://github.com/dtolnay/syn/commit/1f103d4c175ab62b27537a6907c4b77b6aed6ae7"><code>1f103d4</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1779">#1779</a>
from dtolnay/scan</li>
<li><a
href="https://github.com/dtolnay/syn/commit/0986a66e1764ed37a4931dde8c509412474636fe"><code>0986a66</code></a>
Ignore enum_glob_use pedantic clippy lint</li>
<li><a
href="https://github.com/dtolnay/syn/commit/ca97c7d82d9837c1b49c085a546a481cf879e619"><code>ca97c7d</code></a>
Translate expr scanner to table driven</li>
<li><a
href="https://github.com/dtolnay/syn/commit/8039cb37a02cbf080f48416651141d4c77c05075"><code>8039cb3</code></a>
Test that every expr can be scanned</li>
<li><a
href="https://github.com/dtolnay/syn/commit/0132c447fe045431906945178bea219816d5e55f"><code>0132c44</code></a>
Make scan_expr compilable from integration test</li>
<li><a
href="https://github.com/dtolnay/syn/commit/7c102c3c8b3dc076c03cbe842266a2b140be6323"><code>7c102c3</code></a>
Extract non-full expr scanner to module</li>
<li><a
href="https://github.com/dtolnay/syn/commit/ceaf4d693b2af783874b9aa4d50bb208b84a2609"><code>ceaf4d6</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1778">#1778</a>
from dtolnay/exprpeek</li>
<li><a
href="https://github.com/dtolnay/syn/commit/a890e9da22b463b05c06696d4cc767c6cb9d3114"><code>a890e9d</code></a>
Expose can_begin_expr as Expr::peek</li>
<li><a
href="https://github.com/dtolnay/syn/commit/12f068ce0889c41e3bd21662e8a0adfaa07d01d9"><code>12f068c</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1777">#1777</a>
from dtolnay/anygroup</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/syn/compare/2.0.86...2.0.87">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=syn&package-manager=cargo&previous-version=2.0.86&new-version=2.0.87)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>