[chore(cargo)](deps): Bump tokio-test from 0.4.3 to 0.4.4 (#625)

Bumps [tokio-test](https://github.com/tokio-rs/tokio) from 0.4.3 to
0.4.4.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/tokio-rs/tokio/commit/3d0d0fd2af9192ca5cf2836451e96dffab68216a"><code>3d0d0fd</code></a>
chore: prepare tokio-test v0.4.4 (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6400">#6400</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/7cfb1007969e3fcb28b03854f3126caeca93932e"><code>7cfb100</code></a>
chore: prepare tokio-stream v0.1.15 (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6401">#6401</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/e37bd6385430620f850a644d58945ace541afb6e"><code>e37bd63</code></a>
io: implement <code>try_new</code> and <code>try_with_interest</code>
for <code>AsyncFd</code> (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6345">#6345</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/c9e75785c84a441199992ed38e49aeba2f061a24"><code>c9e7578</code></a>
sync: remove <code>'static</code> bound on <code>impl Sink for
PollSender</code> (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6397">#6397</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/3141ed62287043b5400e24ac930b002dc7d11d92"><code>3141ed6</code></a>
sync: update watch channel docs (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6395">#6395</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/ea1cfbdb97f524a1ae465c0f5454dd6690dd5e6e"><code>ea1cfbd</code></a>
sync: reorder const_new before new_with (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6392">#6392</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/fb2dc97468fead3c1d318f209a65648e11ade55d"><code>fb2dc97</code></a>
readme: update commit message guidelines (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6393">#6393</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/a3d2548789d22d4bf193a4614f229944270e912c"><code>a3d2548</code></a>
sync: implement <code>Clone</code> for <code>watch::Sender</code> (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6388">#6388</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/b4ab6472de9a0708873c5f14f3b8de03b149a1c5"><code>b4ab647</code></a>
signal: fix typo in argument name (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6389">#6389</a>)</li>
<li><a
href="https://github.com/tokio-rs/tokio/commit/3133af42e123b9469dad292ae3a090da915d23c5"><code>3133af4</code></a>
runtime: make the <code>enter</code> example deterministic (<a
href="https://redirect.github.com/tokio-rs/tokio/issues/6351">#6351</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/tokio-rs/tokio/compare/tokio-test-0.4.3...tokio-test-0.4.4">compare
view</a></li>
</ul>
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