Auto merge of #27461 - servo:dependabot/cargo/error-chain-0.12.3, r=jdm

build(deps): bump error-chain from 0.12.0 to 0.12.3

Bumps [error-chain](https://github.com/rust-lang-nursery/error-chain) from 0.12.0 to 0.12.3.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/rust-lang-nursery/error-chain/blob/master/CHANGELOG.md">error-chain's changelog</a>.</em></p>
<blockquote>
<h1>0.12.2</h1>
<ul>
<li><a href="https://github-redirect.dependabot.com/rust-lang-nursery/error-chain/pull/285">allow <code>Error::description</code> to be used for rust below 1.42</a></li>
<li><a href="https://github-redirect.dependabot.com/rust-lang-nursery/error-chain/pull/277">Improvements to has_backtrace_depending_on_env</a></li>
<li>Backtrace support now requires rust 1.32.0</li>
</ul>
<h1>0.12.1</h1>
<ul>
<li><a href="https://github-redirect.dependabot.com/rust-lang-nursery/error-chain/pull/255"><code>std::error::Error::cause</code> deprecation update</a></li>
<li><a href="https://github-redirect.dependabot.com/rust-lang-nursery/error-chain/pull/253">Macro invocations use 2018 style</a></li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/rust-lang-nursery/error-chain/commits">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://api.dependabot.com/badges/compatibility_score?dependency-name=error-chain&package-manager=cargo&previous-version=0.12.0&new-version=0.12.3)](https://dependabot.com/compatibility-score/?dependency-name=error-chain&package-manager=cargo&previous-version=0.12.0&new-version=0.12.3)

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Cargo.lock

@@ -1497,11 +1497,12 @@ dependencies = [
 
 [[package]]
 name = "error-chain"
-version = "0.12.0"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07e791d3be96241c77c43846b665ef1384606da2cd2a48730abe606a12906e02"
+checksum = "be51ed50e75656c17216bdd4326914466db0c91b9b246b12962a00284d06566b"
 dependencies = [
  "backtrace",
+ "version_check",
 ]
 
 [[package]]