Bump cfg-expr from 0.15.4 to 0.15.5 (paritytech#1502)

Bumps [cfg-expr](https://github.com/EmbarkStudios/cfg-expr) from 0.15.4
to 0.15.5.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/EmbarkStudios/cfg-expr/releases">cfg-expr's
releases</a>.</em></p>
<blockquote>
<h2>Release 0.15.5</h2>
<h3>Changed</h3>
<ul>
<li><a
href="https://redirect.github.com/EmbarkStudios/cfg-expr/pull/64">PR#64</a>
updated the builtin target list to 1.72.0. It also changed the MSRV to
1.70.0.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/EmbarkStudios/cfg-expr/blob/main/CHANGELOG.md">cfg-expr's
changelog</a>.</em></p>
<blockquote>
<h2>[0.15.5] - 2023-09-08</h2>
<h3>Changed</h3>
<ul>
<li><a
href="https://redirect.github.com/EmbarkStudios/cfg-expr/pull/64">PR#64</a>
updated the builtin target list to 1.72.0. It also changed the MSRV to
1.70.0.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/EmbarkStudios/cfg-expr/commit/2ba00cc821bf47fe0c44f09159486dcddd387e68"><code>2ba00cc</code></a>
Release 0.15.5</li>
<li><a
href="https://github.com/EmbarkStudios/cfg-expr/commit/2ba956f7ce7feb01a8852285d7f25db0fd7b2ba2"><code>2ba956f</code></a>
Update to 1.72.0 targets (<a
href="https://redirect.github.com/EmbarkStudios/cfg-expr/issues/64">#64</a>)</li>
<li>See full diff in <a
href="https://github.com/EmbarkStudios/cfg-expr/compare/0.15.4...0.15.5">compare
view</a></li>
</ul>
</details>
<br />


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substrate/frame/support/procedural/Cargo.toml

@@ -17,7 +17,7 @@ proc-macro = true
 [dependencies]
 derive-syn-parse = "0.1.5"
 Inflector = "0.11.4"
-cfg-expr = "0.15.4"
+cfg-expr = "0.15.5"
 itertools = "0.10.3"
 proc-macro2 = "1.0.56"
 quote = "1.0.28"