Bump petgraph from 0.6.5 to 0.6.6 (#2587)

Bumps [petgraph](https://github.com/petgraph/petgraph) from 0.6.5 to
0.6.6.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/petgraph/petgraph/blob/master/RELEASES.rst">petgraph's
changelog</a>.</em></p>
<blockquote>
<h1>Version 0.6.6 (2024-12-31)</h1>
<ul>
<li>Add graph6 format encoder and decoder
(<code>[#658](https://github.com/petgraph/petgraph/issues/658)</code>_)</li>
<li>Dynamic Topological Sort algorithm support
(<code>[#675](https://github.com/petgraph/petgraph/issues/675)</code>_)</li>
<li>Add <code>UndirectedAdaptor</code>
(<code>[#695](https://github.com/petgraph/petgraph/issues/695)</code>_)</li>
<li>Add <code>LowerHex</code> and <code>UpperHex</code> implementations
for <code>Dot</code>
(<code>[#687](https://github.com/petgraph/petgraph/issues/687)</code>_)</li>
<li>Make <code>serde</code> support more complete
(<code>[#550](https://github.com/petgraph/petgraph/issues/550)</code>_)</li>
<li>Process multiple edges in the Floyd-Warshall implementation
(<code>[#685](https://github.com/petgraph/petgraph/issues/685)</code>_)</li>
<li>Update <code>fixedbitset</code> to 0.5.7
(<code>[#664](https://github.com/petgraph/petgraph/issues/664)</code>_)</li>
<li>Fix <code>immediately_dominated_by</code> function called on root of
graph returns root itself
(<code>[#670](https://github.com/petgraph/petgraph/issues/670)</code>_)</li>
<li>Fix adjacency matrix for <code>Csr</code> and <code>List</code>
(<code>[#648](https://github.com/petgraph/petgraph/issues/648)</code>_)</li>
<li>Fix clippy warnings
(<code>[#701](https://github.com/petgraph/petgraph/issues/701)</code>_)</li>
<li>Add performance note to the <code>all_simple_paths</code> function
documentation
(<code>[#693](https://github.com/petgraph/petgraph/issues/693)</code>_)</li>
</ul>
<p>..
_<code>[#658](https://github.com/petgraph/petgraph/issues/658)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/658">petgraph/petgraph#658</a>
..
_<code>[#675](https://github.com/petgraph/petgraph/issues/675)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/675">petgraph/petgraph#675</a>
..
_<code>[#695](https://github.com/petgraph/petgraph/issues/695)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/695">petgraph/petgraph#695</a>
..
_<code>[#687](https://github.com/petgraph/petgraph/issues/687)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/687">petgraph/petgraph#687</a>
..
_<code>[#550](https://github.com/petgraph/petgraph/issues/550)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/550">petgraph/petgraph#550</a>
..
_<code>[#685](https://github.com/petgraph/petgraph/issues/685)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/685">petgraph/petgraph#685</a>
..
_<code>[#664](https://github.com/petgraph/petgraph/issues/664)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/664">petgraph/petgraph#664</a>
..
_<code>[#670](https://github.com/petgraph/petgraph/issues/670)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/670">petgraph/petgraph#670</a>
..
_<code>[#648](https://github.com/petgraph/petgraph/issues/648)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/648">petgraph/petgraph#648</a>
..
_<code>[#701](https://github.com/petgraph/petgraph/issues/701)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/701">petgraph/petgraph#701</a>
..
_<code>[#693](https://github.com/petgraph/petgraph/issues/693)</code>:
<a
href="https://redirect.github.com/petgraph/petgraph/pull/693">petgraph/petgraph#693</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/petgraph/petgraph/commit/13ebd7d2ddd4a1ac07a33606c0d4f82d342e5fa6"><code>13ebd7d</code></a>
Release <code>0.6.6</code> (<a
href="https://redirect.github.com/petgraph/petgraph/issues/706">#706</a>)</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/159341e4af2a1292d8a1da428d64784e2dfc8ae5"><code>159341e</code></a>
Implement DSatur graph coloring algorithm</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/7fa3aac97168de7fca54644a5b45c464d5245535"><code>7fa3aac</code></a>
fix: adjacency matrix for csr and adjacency list (<a
href="https://redirect.github.com/petgraph/petgraph/issues/648">#648</a>)</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/9fda6bbe2e52663d03317083d2623faa4f0d4cd4"><code>9fda6bb</code></a>
Update gitignore with possible editor extensions to ensure they do not
occur ...</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/9b5837e395c342e9cb2e5a2b3870fa7ee6650ef4"><code>9b5837e</code></a>
Allow clippy::needless_range_loop in benches</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/ad9f83c2ae237ba6f5832a19f01ef8c3ae14dd19"><code>ad9f83c</code></a>
Process warnings in 'test' target</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/4f0ddc7c144fac9a7e8b33b2bb6fdcbbed4de0d5"><code>4f0ddc7</code></a>
Satisfy Clippy in docs lints</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/9c5c45072ae0a42e6e7aae4bf293a7660ee482ce"><code>9c5c450</code></a>
Satisfy Clippy in everything except docs</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/e6401e787f43503cffef000492ff5cf76e9a7565"><code>e6401e7</code></a>
Elide the lifetimes</li>
<li><a
href="https://github.com/petgraph/petgraph/commit/5c9f9ccfeaa6ae381a41dd1c23426edaf197c5f4"><code>5c9f9cc</code></a>
Solve dead code warnings</li>
<li>Additional commits viewable in <a
href="https://github.com/petgraph/petgraph/compare/[email protected]@v0.6.6">compare
view</a></li>
</ul>
</details>
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