Auto merge of #26530 - servo:dependabot/cargo/tokio-udp-0.1.6, r=jdm

Bump tokio-udp from 0.1.2 to 0.1.6

Bumps [tokio-udp](https://github.com/tokio-rs/tokio) from 0.1.2 to 0.1.6.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/tokio-rs/tokio/blob/tokio-0.1.6/CHANGELOG.md">tokio-udp's changelog</a>.</em></p>
<blockquote>
<h1>0.1.6 (May 2, 2018)</h1>
<ul>
<li>Add asynchronous filesystem APIs (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/323">#323</a>).</li>
<li>Add &quot;current thread&quot; runtime variant (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/308">#308</a>).</li>
<li><code>CurrentThread</code>: Expose inner <code>Park</code> instance.</li>
<li>Improve fairness of <code>CurrentThread</code> executor (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/313">#313</a>).</li>
</ul>
<h1>0.1.5 (March 30, 2018)</h1>
<ul>
<li>Provide timer API (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/266">#266</a>)</li>
</ul>
<h1>0.1.4 (March 22, 2018)</h1>
<ul>
<li>Fix build on FreeBSD (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/218">#218</a>)</li>
<li>Shutdown the Runtime when the handle is dropped (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/214">#214</a>)</li>
<li>Set Runtime thread name prefix for worker threads (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/232">#232</a>)</li>
<li>Add builder for Runtime (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/234">#234</a>)</li>
<li>Extract TCP and UDP types into separate crates (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/224">#224</a>)</li>
<li>Optionally support futures 0.2.</li>
</ul>
<h1>0.1.3 (March 09, 2018)</h1>
<ul>
<li>Fix <code>CurrentThread::turn</code> to block on idle (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/212">#212</a>).</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="8235eefbf0"><code>8235eef</code></a> Fix some dependency versions (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/337">#337</a>)</li>
<li><a href="14b31bdba5"><code>14b31bd</code></a> Bump version to v0.1.6 (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/336">#336</a>)</li>
<li><a href="f768163982"><code>f768163</code></a> Filesystem manipulation APIs. (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/323">#323</a>)</li>
<li><a href="7a2b5db15c"><code>7a2b5db</code></a> Remove <code>futures2</code> feature from Cargo.toml files (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/334">#334</a>)</li>
<li><a href="2465483845"><code>2465483</code></a> Current thread runtime (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/308">#308</a>)</li>
<li><a href="6a0ecef81a"><code>6a0ecef</code></a> Timer: always park nested Park (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/327">#327</a>)</li>
<li><a href="6defeeb2ba"><code>6defeeb</code></a> current_thread: make underlying <code>Park</code> instance accessible</li>
<li><a href="b36a73059d"><code>b36a730</code></a> tokio-io: require bytes-0.4.7 for Buf::get_uint_be</li>
<li><a href="d1d4fe4d07"><code>d1d4fe4</code></a> Stop using deprecated bytes APIs in tests (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/324">#324</a>) (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/331">#331</a>)</li>
<li><a href="9aaa8f06d1"><code>9aaa8f0</code></a> Stop using deprecated bytes APIs (<a href="https://github-redirect.dependabot.com/tokio-rs/tokio/issues/324">#324</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/tokio-rs/tokio/compare/tokio-udp-0.1.2...tokio-0.1.6">compare view</a></li>
</ul>
</details>
<br />

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Cargo.lock

@@ -5988,9 +5988,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-udp"
-version = "0.1.2"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da941144b816d0dcda4db3a1ba87596e4df5e860a72b70783fe435891f80601c"
+checksum = "e2a0b10e610b39c38b031a2fcab08e4b82f16ece36504988dcbd81dbba650d82"
 dependencies = [
  "bytes",
  "futures",