Bump serde from 1.0.185 to 1.0.188 in /packer (#5090)

Summary:
Bumps [serde](https://github.com/serde-rs/serde) from 1.0.185 to 1.0.188.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/serde-rs/serde/releases">serde's releases</a>.</em></p>
<blockquote>
<h2>v1.0.188</h2>
<ul>
<li>Fix <em>&quot;failed to parse manifest&quot;</em> error when building serde using a Cargo version between 1.45 and 1.50 (<a href="https://redirect.github.com/serde-rs/serde/issues/2603">https://github.com/facebook/flipper/issues/2603</a>)</li>
</ul>
<h2>v1.0.187</h2>
<ul>
<li>Remove support for Emscripten targets on rustc older than 1.40 (<a href="https://redirect.github.com/serde-rs/serde/issues/2600">https://github.com/facebook/flipper/issues/2600</a>)</li>
</ul>
<h2>v1.0.186</h2>
<ul>
<li>Disallow incompatible versions of <code>serde_derive</code> and <code>serde</code> in the dependency graph (<a href="https://redirect.github.com/serde-rs/serde/issues/2588">https://github.com/facebook/flipper/issues/2588</a>, thanks <a href="https://github.com/soqb"><code>@​soqb</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="dad15b9fd0"><code>dad15b9</code></a> Release 1.0.188</li>
<li><a href="d89c19f903"><code>d89c19f</code></a> Revert &quot;Adopt new Cargo feature resolver&quot;</li>
<li><a href="146dc0fad5"><code>146dc0f</code></a> Release 1.0.187</li>
<li><a href="d26852deef"><code>d26852d</code></a> Merge pull request <a href="https://redirect.github.com/serde-rs/serde/issues/2602">https://github.com/facebook/flipper/issues/2602</a> from dtolnay/resolver</li>
<li><a href="e1c27243b2"><code>e1c2724</code></a> Adopt new Cargo feature resolver</li>
<li><a href="dbbfe7abe2"><code>dbbfe7a</code></a> Merge pull request <a href="https://redirect.github.com/serde-rs/serde/issues/2600">https://github.com/facebook/flipper/issues/2600</a> from dtolnay/oldemscripten</li>
<li><a href="dc24d12ce0"><code>dc24d12</code></a> Clean up all usage of serde_if_integer128</li>
<li><a href="4e7533e872"><code>4e7533e</code></a> Remove support for emscripten targets on rustc older than 1.40</li>
<li><a href="5d036515ed"><code>5d03651</code></a> Release 1.0.186</li>
<li><a href="a741293886"><code>a741293</code></a> Merge pull request <a href="https://redirect.github.com/serde-rs/serde/issues/2599">https://github.com/facebook/flipper/issues/2599</a> from dtolnay/encodeutf8</li>
<li>Additional commits viewable in <a href="https://github.com/serde-rs/serde/compare/v1.0.185...v1.0.188">compare view</a></li>
</ul>
</details>
<br />

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</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/5090

Reviewed By: aigoncharov

Differential Revision: D48778219

Pulled By: passy

fbshipit-source-id: fdf558152f45ad2e1961b660de19ce4abe94812d

packer/Cargo.lock

@@ -700,18 +700,18 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "serde"
-version = "1.0.185"
+version = "1.0.188"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be9b6f69f1dfd54c3b568ffa45c310d6973a5e5148fd40cf515acaf38cf5bc31"
+checksum = "cf9e0fcba69a370eed61bcf2b728575f726b50b55cba78064753d708ddc7549e"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.185"
+version = "1.0.188"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc59dfdcbad1437773485e0367fea4b090a2e0a16d9ffc46af47764536a298ec"
+checksum = "4eca7ac642d82aa35b60049a6eccb4be6be75e599bd2e9adb5f875a737654af2"
 dependencies = [
  "proc-macro2",
  "quote",