Bump serde from 1.0.153 to 1.0.154 (#1852)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.153 to
1.0.154.
<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>v1.0.154</h2>
<ul>
<li>Fix &quot;undeclared lifetime&quot; error in generated code when
deriving Deserialize for an enum with both <code>flatten</code> and
<code>'static</code> fields (<a
href="https://github-redirect.dependabot.com/serde-rs/serde/issues/2383">#2383</a>,
thanks <a
href="https://github.com/Mingun"><code>@​Mingun</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/serde-rs/serde/commit/6a5da85fcd121b4a29ea333707403ce31f49d1e7"><code>6a5da85</code></a>
Release 1.0.154</li>
<li><a
href="https://github.com/serde-rs/serde/commit/0750eee4ff14ab20991222ea98965b547e6ddbd0"><code>0750eee</code></a>
Merge pull request <a
href="https://github-redirect.dependabot.com/serde-rs/serde/issues/2383">#2383</a>
from Mingun/fix-flatten+static</li>
<li><a
href="https://github.com/serde-rs/serde/commit/ef551a517c0b02c03774e7a95010179cddae7ea0"><code>ef551a5</code></a>
Merge pull request <a
href="https://github-redirect.dependabot.com/serde-rs/serde/issues/2389">#2389</a>
from dtolnay/trimstart</li>
<li><a
href="https://github.com/serde-rs/serde/commit/1c5ea24f76d488308f6fbe50dfe35401d7110c97"><code>1c5ea24</code></a>
Replace use of deprecated trim_left_matches with trim_start_matches</li>
<li><a
href="https://github.com/serde-rs/serde/commit/88d73e52504c9a3371ca8b81194fa7477c6cf3a9"><code>88d73e5</code></a>
Format PR 2387 with rustfmt</li>
<li><a
href="https://github.com/serde-rs/serde/commit/1ff2a972c69eece9c576a70a96c45d5167ad7481"><code>1ff2a97</code></a>
Merge pull request <a
href="https://github-redirect.dependabot.com/serde-rs/serde/issues/2388">#2388</a>
from serde-rs/exhaustivepatterns</li>
<li><a
href="https://github.com/serde-rs/serde/commit/bb72fe2726b4634813f24a045fbd72780232f25f"><code>bb72fe2</code></a>
Update the comment on simpler exhaustive matching in derive</li>
<li><a
href="https://github.com/serde-rs/serde/commit/38c130a30350401a0211e519bc7b06ae3df49ccd"><code>38c130a</code></a>
Do not generate <code>DeserializeSeed</code> impl when not needed</li>
<li><a
href="https://github.com/serde-rs/serde/commit/c7393614ffac49ea5a85bbb8ee5ae43b2657a139"><code>c739361</code></a>
Fix generation of non-existent lifetime 'de when enum contains a
#[serde(flat...</li>
<li>See full diff in <a
href="https://github.com/serde-rs/serde/compare/v1.0.153...v1.0.154">compare
view</a></li>
</ul>
</details>
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