Bump lodash from 4.17.15 to 4.17.21 in /fixtures/art (#27588)

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to
4.17.21.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/lodash/lodash/commit/f299b52f39486275a9e6483b60a410e06520c538"><code>f299b52</code></a>
Bump to v4.17.21</li>
<li><a
href="https://github.com/lodash/lodash/commit/c4847ebe7d14540bb28a8b932a9ce1b9ecbfee1a"><code>c4847eb</code></a>
Improve performance of <code>toNumber</code>, <code>trim</code> and
<code>trimEnd</code> on large input strings</li>
<li><a
href="https://github.com/lodash/lodash/commit/3469357cff396a26c363f8c1b5a91dde28ba4b1c"><code>3469357</code></a>
Prevent command injection through <code>_.template</code>'s
<code>variable</code> option</li>
<li><a
href="https://github.com/lodash/lodash/commit/ded9bc66583ed0b4e3b7dc906206d40757b4a90a"><code>ded9bc6</code></a>
Bump to v4.17.20.</li>
<li><a
href="https://github.com/lodash/lodash/commit/63150ef7645ac07961b63a86490f419f356429aa"><code>63150ef</code></a>
Documentation fixes.</li>
<li><a
href="https://github.com/lodash/lodash/commit/00f0f62a979d2f5fa0287c06eae70cf9a62d8794"><code>00f0f62</code></a>
test.js: Remove trailing comma.</li>
<li><a
href="https://github.com/lodash/lodash/commit/846e434c7a5b5692c55ebf5715ed677b70a32389"><code>846e434</code></a>
Temporarily use a custom fork of <code>lodash-cli</code>.</li>
<li><a
href="https://github.com/lodash/lodash/commit/5d046f39cbd27f573914768e3b36eeefcc4f1229"><code>5d046f3</code></a>
Re-enable Travis tests on <code>4.17</code> branch.</li>
<li><a
href="https://github.com/lodash/lodash/commit/aa816b36d402a1ad9385142ce7188f17dae514fd"><code>aa816b3</code></a>
Remove <code>/npm-package</code>.</li>
<li><a
href="https://github.com/lodash/lodash/commit/d7fbc52ee0466a6d248f047b5d5c3e6d1e099056"><code>d7fbc52</code></a>
Bump to v4.17.19</li>
<li>Additional commits viewable in <a
href="https://github.com/lodash/lodash/compare/4.17.15...4.17.21">compare
view</a></li>
</ul>
</details>
<details>
<summary>Maintainer changes</summary>
<p>This version was pushed to npm by <a
href="https://www.npmjs.com/~bnjmnt4n">bnjmnt4n</a>, a new releaser for
lodash since your current version.</p>
</details>
<br />


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fixtures/art/yarn.lock

@@ -1890,15 +1890,10 @@ locate-path@^3.0.0:
     p-locate "^3.0.0"
     path-exists "^3.0.0"
 
-lodash@^4.17.13:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
-  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
-
-lodash@^4.17.19:
-  version "4.17.19"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
-  integrity sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==
+lodash@^4.17.13, lodash@^4.17.19:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 longest@^1.0.1:
   version "1.0.1"