chore(deps): Update cbindgen requirement from 0.25 to 0.26 (#460)

Updates the requirements on
[cbindgen](https://github.com/mozilla/cbindgen) to permit the latest
version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/mozilla/cbindgen/releases">cbindgen's
releases</a>.</em></p>
<blockquote>
<h2>0.26.0</h2>
<ul>
<li>Fix swapping of <code>&gt;&gt;=</code> and <code>&lt;&lt;=</code> in
constants.</li>
<li>Add support for #[deprecated] (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/860">#860</a>).</li>
<li>Built-in support for bitflags 2.0.</li>
<li>Support for &quot;C-unwind&quot; ABI.</li>
<li>Generate bindings for non-public extern items if they are
#[no_mangle].</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/mozilla/cbindgen/blob/master/CHANGES">cbindgen's
changelog</a>.</em></p>
<blockquote>
<h1>0.26.0</h1>
<pre><code>  * Fix swapping of `&gt;&gt;=` and `&lt;&lt;=` in constants.
* Add support for #[deprecated]
([#860](mozilla/cbindgen#860)).
  * Built-in support for bitflags 2.0.
  * Support for &quot;C-unwind&quot; ABI.
* Generate bindings for non-public extern items if they are
#[no_mangle].
</code></pre>
<h2>0.25.0</h2>
<pre><code>  * Re-release of yanked 0.24.6 as a major release
  * Update MSRV to 1.57
* Support variadic arguments (`...`)
([#805](mozilla/cbindgen#805))
* Add --depfile option
([#820](mozilla/cbindgen#820))
  * Breaking changes: The `Config` struct now has a private member.
</code></pre>
<h2>0.24.6 (YANKED: depfile option was breaking, see <a
href="https://redirect.github.com/mozilla/cbindgen/issues/841">#841</a>)</h2>
<pre><code>  * Update MSRV to 1.57
* Support variadic arguments (`...`)
([#805](mozilla/cbindgen#805))
* Add --depfile option
([#820](mozilla/cbindgen#820))
</code></pre>
<h2>0.24.5</h2>
<pre><code>  * Don't enforce tempfile version.
</code></pre>
<h2>0.24.4</h2>
<pre><code> * Move expand infinite recursion fix
([#799](mozilla/cbindgen#799))
* Add with_cpp_compat to the builder
([#796](mozilla/cbindgen#796))
* Handle never type in return position consistently
([#780](mozilla/cbindgen#780))
* Fix warnings ([#816](mozilla/cbindgen#816),
[#819](mozilla/cbindgen#819))
* Updated documentation
([#788](mozilla/cbindgen#788),
[#791](mozilla/cbindgen#791),
[#792](mozilla/cbindgen#792),
[#810](mozilla/cbindgen#810),
[#823](mozilla/cbindgen#823))
</code></pre>
<h2>0.24.3</h2>
<pre><code> * Make struct expressions correctly generated through
typedefs ([#768](mozilla/cbindgen#768)).
</code></pre>
<h2>0.24.2</h2>
<pre><code>  * Make bitfield operators use explicit constructors.
</code></pre>
<h2>0.24.1</h2>
<pre><code> * Add support for unary negation
([#765](mozilla/cbindgen#765)).
* Make more bitfield operators constexpr
([#765](mozilla/cbindgen#765)).
</code></pre>
<h2>0.24.0</h2>
<pre><code> * Basic const generic support
([#759](mozilla/cbindgen#759),
[#760](mozilla/cbindgen#760)
[#762](mozilla/cbindgen#762)).
</code></pre>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/mozilla/cbindgen/commit/703b53c06f9fe2dbc0193d67626558cfa84a0f62"><code>703b53c</code></a>
v0.26.0</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/56f0febc9b5cc7ee957912d55b1fdee67f34d766"><code>56f0feb</code></a>
Update MSRV in Readme</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/9b4a14958ea6ce2a61accb9cdbad84cfca9c3013"><code>9b4a149</code></a>
Add support for out-of-line bitfields declarations</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/35f2e44ef2792d1c2e9e97f8ccf4458b79ae88f2"><code>35f2e44</code></a>
Update URLs</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/85eb0f4436e90d479f5d041b98f160ce2e66eeea"><code>85eb0f4</code></a>
Bump clippy msrv to 1.64</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/43af1ebe6e4d2bb9ec90167616a3d88bf34c7c0b"><code>43af1eb</code></a>
Handle bitflags bits method calls</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/f72e44715697981b9317b7f0688216990e60346d"><code>f72e447</code></a>
CHANGES: Note #[deprecated] support.</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/14730702306533c2805c9dd4a6846e762a4bbcca"><code>1473070</code></a>
utilities: annotation: Clean-up deprecated parsing and getter.</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/0fb5d07ae4ede7d3fcf91c47bcfa29090ce0a8b9"><code>0fb5d07</code></a>
Add support for #[deprecated].</li>
<li><a
href="https://github.com/mozilla/cbindgen/commit/d8355da4664f68d399631f2f215cbf991c121d2f"><code>d8355da</code></a>
Support &quot;C-unwind&quot; ABI</li>
<li>Additional commits viewable in <a
href="https://github.com/mozilla/cbindgen/compare/v0.25.0...0.26.0">compare
view</a></li>
</ul>
</details>
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runtime/Cargo.toml

@@ -35,4 +35,4 @@ register-filesystem = [] # enables wasm to be loaded from disk
 http = ["ureq"]          # enables extism_http_request
 
 [build-dependencies]
-cbindgen = "0.25"
+cbindgen = "0.26"