Bump multihash from 0.17.0 to 0.18.1 (#2592)

Bumps [multihash](https://github.com/multiformats/rust-multihash) from
0.17.0 to 0.18.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/multiformats/rust-multihash/blob/master/CHANGELOG.md">multihash's
changelog</a>.</em></p>
<blockquote>
<h2><a
href="https://github.com/multiformats/rust-multihash/compare/v0.18.0...v0.18.1">v0.18.1</a>
(2023-04-14)</h2>
<h3>Bug Fixes</h3>
<ul>
<li>don't panic on non minimal varints (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/293">#293</a>)
(<a
href="https://github.com/multiformats/rust-multihash/commit/c3445fc5041b0fc573945321ebd4b0cdffe0daa5">c3445fc</a>),
closes <a
href="https://redirect.github.com/multiformats/rust-multihash/issues/282">#282</a></li>
</ul>
<h2><a
href="https://github.com/multiformats/rust-multihash/compare/v0.17.0...v0.18.0">0.18.0</a>
(2022-12-06)</h2>
<h3>⚠

 BREAKING CHANGES</h3>
<ul>
<li>
<p>update to Rust edition 2021</p>
</li>
<li>
<p><code>Multihash::write()</code> returns bytes written</p>
<p>Prior to this change it returned an empty tuple <code>()</code>, now
it returns
the bytes written.</p>
</li>
</ul>
<h3>Features</h3>
<ul>
<li>add <code>encoded_len</code> and bytes written (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/252">#252</a>)
(<a
href="https://github.com/multiformats/rust-multihash/commit/b3cc43ecb6f9c59da774b094853d6542430d55ad">b3cc43e</a>)</li>
</ul>
<h3>Bug Fixes</h3>
<ul>
<li>remove Nix support (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/254">#254</a>)
(<a
href="https://github.com/multiformats/rust-multihash/commit/ebf57ddb82be2d2fd0a2f00666b0f888d4c78e1b">ebf57dd</a>),
closes <a
href="https://redirect.github.com/multiformats/rust-multihash/issues/247">#247</a></li>
<li>update to Rust edition 2021 (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/255">#255</a>)
(<a
href="https://github.com/multiformats/rust-multihash/commit/da53376e0d9cf2d82d6c0d10590a77991cb3a6b6">da53376</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/02c5c664a7e59f6ecf84e81276c4eb8bb65693d5"><code>02c5c66</code></a>
chore: Release multihash version 0.18.1</li>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/d08a25d8d624f4a3afcad0ecf724f7d9a20b5e28"><code>d08a25d</code></a>
chore: add 0.18.1 to changelog</li>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/c3445fc5041b0fc573945321ebd4b0cdffe0daa5"><code>c3445fc</code></a>
fix: don't panic on non minimal varints (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/293">#293</a>)</li>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/f015e0a2e4f55742eca95ddbb5561d8c703d551f"><code>f015e0a</code></a>
chore: Release</li>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/8651573323c4191931e12cf9f1ed5feabf5a4989"><code>8651573</code></a>
Two small cleanups before the release (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/257">#257</a>)</li>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/048d2350b3fa3ac1fec59bbf8cd8063e00b13593"><code>048d235</code></a>
chore: add v0.18 changelog (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/253">#253</a>)</li>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/da53376e0d9cf2d82d6c0d10590a77991cb3a6b6"><code>da53376</code></a>
fix: update to Rust edition 2021 (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/255">#255</a>)</li>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/ebf57ddb82be2d2fd0a2f00666b0f888d4c78e1b"><code>ebf57dd</code></a>
fix: remove Nix support (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/254">#254</a>)</li>
<li><a
href="https://github.com/multiformats/rust-multihash/commit/b3cc43ecb6f9c59da774b094853d6542430d55ad"><code>b3cc43e</code></a>
feat: add <code>encoded_len</code> and bytes written (<a
href="https://redirect.github.com/multiformats/rust-multihash/issues/252">#252</a>)</li>
<li>See full diff in <a
href="https://github.com/multiformats/rust-multihash/compare/v0.17.0...v0.18.1">compare
view</a></li>
</ul>
</details>
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Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sebastian Kunert <[email protected]>