Bump acorn from 8.17.0 to 8.18.0 in /ui (#3270)

Bumps [acorn](https://github.com/acornjs/acorn) from 8.17.0 to 8.18.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/acornjs/acorn/commit/d788421b242ddccb28040f1431438ee5cf474208"><code>d788421</code></a>
Mark version 8.18.0</li>
<li><a
href="https://github.com/acornjs/acorn/commit/b61cb9a4f245c0f7abc8c3ea9f85b5ac8bc5fbce"><code>b61cb9a</code></a>
Add startLocation option</li>
<li><a
href="https://github.com/acornjs/acorn/commit/c8d515c7f9c8baa62bf5ccffba98507b7be46218"><code>c8d515c</code></a>
Don't compute curLine when locations are off</li>
<li><a
href="https://github.com/acornjs/acorn/commit/a7bd3cd15702d28a7c8ef28365b3f04cf00d107c"><code>a7bd3cd</code></a>
Reject an unparenthesized arrow function as the left operand of
<code>**</code></li>
<li><a
href="https://github.com/acornjs/acorn/commit/b7c31b626e135c4ed130ff5063c44c20ea8e231a"><code>b7c31b6</code></a>
Fix mistake in previous patch</li>
<li><a
href="https://github.com/acornjs/acorn/commit/5c4af50af1536f144f0a4f254c50e5e34c0a2415"><code>5c4af50</code></a>
Avoid scanning from start of document in loose parser's resetTo</li>
<li>See full diff in <a
href="https://github.com/acornjs/acorn/compare/8.17.0...8.18.0">compare
view</a></li>
</ul>
</details>
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ui/yarn.lock

@@ -1434,9 +1434,9 @@ acorn-jsx@^5.3.2:
   integrity sha512-rq9s+JNhf0IChjtDXxllJ7g41oZk5SlXtp0LHwyA5cejwn7vKmKp4pPri6YEePv2PU65sAsegbXtIinmDFDXgQ==
 
 acorn@^8.15.0:
-  version "8.17.0"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.17.0.tgz#1785adb84faf8d8add10369b93826fc2bd08f1fe"
-  integrity sha512-xRQbDb9BnwDafYNn6Vwl839DYVjqXYb1XVGtWAZ1kcDc6iwAL4hg3B1dZlRiuENFeO2H53gFG3in621AdERVAg==
+  version "8.18.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.18.0.tgz#4faf01b2d6d326bfeed97aea1f52220b5f4c1940"
+  integrity sha512-lGq+9yr1/GuAWaVYIHRjvvySG5/4VfKIvC8EWxStPdcDh/Ka7FG3twP6v4d5BkravUilhIAsG4Qj83t02LWUPQ==
 
 ajv@^6.12.4, ajv@^6.14.0:
   version "6.15.0"