Bump indexmap from 1.8.0 to 1.8.1 (#1988)

Bumps [indexmap](https://github.com/bluss/indexmap) from 1.8.0 to 1.8.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/bluss/indexmap/blob/master/RELEASES.md">indexmap's changelog</a>.</em></p>
<blockquote>
<ul>
<li>
<p>1.8.1</p>
<ul>
<li>The new <code>IndexSet::replace_full</code> will return the index of the item along
with the replaced value, if any, by <a href="https://github.com/zakcutner"><code>@​zakcutner</code></a> in PR <a href="https://github-redirect.dependabot.com/bluss/indexmap/pull/222">222</a>.</li>
</ul>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="275379c489"><code>275379c</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/bluss/indexmap/issues/222">#222</a> from zakcutner/replace-full</li>
<li><a href="12162abeb0"><code>12162ab</code></a> Release 1.8.1</li>
<li><a href="feb816c4b8"><code>feb816c</code></a> Add a <code>replace_full</code> method on <code>IndexSet</code></li>
<li><a href="d6a9dd6c91"><code>d6a9dd6</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/bluss/indexmap/issues/218">#218</a> from erickt/miri</li>
<li><a href="4dd6619b4c"><code>4dd6619</code></a> Add miri builder</li>
<li><a href="10ee11e56c"><code>10ee11e</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/bluss/indexmap/issues/216">#216</a> from cuviper/dev-dependencies</li>
<li><a href="98de9abe37"><code>98de9ab</code></a> Update dev-dependencies</li>
<li>See full diff in <a href="https://github.com/bluss/indexmap/compare/1.8.0...1.8.1">compare view</a></li>
</ul>
</details>
<br />


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</details>

Cargo.lock

@@ -600,9 +600,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "1.8.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "282a6247722caba404c065016bbfa522806e51714c34f5dfc3e4a3a46fcb4223"
+checksum = "0f647032dfaa1f8b6dc29bd3edb7bbef4861b8b8007ebb118d6db284fd59f6ee"
 dependencies = [
  "autocfg",
  "hashbrown",

boa_engine/Cargo.toml

@@ -33,7 +33,7 @@ rustc-hash = "1.1.0"
 num-bigint = { version = "0.4.3", features = ["serde"] }
 num-integer = "0.1.44"
 bitflags = "1.3.2"
-indexmap = "1.8.0"
+indexmap = "1.8.1"
 ryu-js = "0.2.2"
 chrono = "0.4.19"
 fast-float = "0.2.0"