Auto merge of #26693 - servo:dependabot/cargo/regex-1.3.7, r=jdm
Auto merge of #26693 - servo:dependabot/cargo/regex-1.3.7, r=jdm

Bump regex from 1.3.4 to 1.3.7

Bumps [regex](https://github.com/rust-lang/regex) from 1.3.4 to 1.3.7.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/rust-lang/regex/blob/master/CHANGELOG.md">regex's changelog</a>.</em></p>
<blockquote>
<h1>1.3.7 (2020-04-17)</h1>
<p>This release contains a small bug fix that fixes how <code>regex</code> forwards crate
features to <code>regex-syntax</code>. In particular, this will reduce recompilations in
some cases.</p>
<p>Bug fixes:</p>
<ul>
<li>[BUG <a href="https://github-redirect.dependabot.com/rust-lang/regex/issues/665">#665</a>](<a href="https://github-redirect.dependabot.com/rust-lang/regex/pull/665">rust-lang/regex#665</a>):
Fix feature forwarding to <code>regex-syntax</code>.</li>
</ul>
<h1>1.3.6 (2020-03-24)</h1>
<p>This release contains a sizable (~30%) performance improvement when compiling
some kinds of large regular expressions.</p>
<p>Performance improvements:</p>
<ul>
<li>[PERF <a href="https://github-redirect.dependabot.com/rust-lang/regex/issues/657">#657</a>](<a href="https://github-redirect.dependabot.com/rust-lang/regex/pull/657">rust-lang/regex#657</a>):
Improvement performance of compiling large regular expressions.</li>
</ul>
<h1>1.3.5 (2020-03-12)</h1>
<p>This release updates this crate to Unicode 13.</p>
<p>New features:</p>
<ul>
<li>[FEATURE <a href="https://github-redirect.dependabot.com/rust-lang/regex/issues/653">#653</a>](<a href="https://github-redirect.dependabot.com/rust-lang/regex/pull/653">rust-lang/regex#653</a>):
Update <code>regex-syntax</code> to Unicode 13.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/rust-lang/regex/commit/adb4aa3ce437ba1978af540071f85e302cced3ec"><code>adb4aa3</code></a> regex-1.3.7</li>
<li><a href="https://github.com/rust-lang/regex/commit/761284d2ee61793fd5bfb5fc9ff7d94ea1ee9746"><code>761284d</code></a> changelog: 1.3.7</li>
<li><a href="https://github.com/rust-lang/regex/commit/672d877019b3d1ef4a7f7bd877a055236e38bc58"><code>672d877</code></a> sparse: add better Debug impl</li>
<li><a href="https://github.com/rust-lang/regex/commit/b490e0b2e58158974a837e527cccc3d9409ba043"><code>b490e0b</code></a> cargo: tweak features for regex-syntax</li>
<li><a href="https://github.com/rust-lang/regex/commit/3221cdb1e33064ed6648d0a5559711cea9c18067"><code>3221cdb</code></a> 1.3.6</li>
<li><a href="https://github.com/rust-lang/regex/commit/3d1c01c8f0b3f7523156fba5e2aed41f260c86f4"><code>3d1c01c</code></a> changelog: 1.3.6</li>
<li><a href="https://github.com/rust-lang/regex/commit/85ac3852cda04cd7208d5ea88001811fcb3b5639"><code>85ac385</code></a> compile: add fast path for c_char</li>
<li><a href="https://github.com/rust-lang/regex/commit/3ff6ae19ee829f16213fc3d12d40f130f1ebb355"><code>3ff6ae1</code></a> syntax: improve allocation of escape_into</li>
<li><a href="https://github.com/rust-lang/regex/commit/c1585975f4d5a56c52c1b0bba145fcb1947ed33a"><code>c158597</code></a> syntax: regenerate tables for version info</li>
<li><a href="https://github.com/rust-lang/regex/commit/6ed385735789205e1c419da31d92b915f3f142eb"><code>6ed3857</code></a> 1.3.5</li>
<li>Additional commits viewable in <a href="https://github.com/rust-lang/regex/compare/1.3.4...regex-1.3.7">compare view</a></li>
</ul>
</details>
<br />

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