chore(deps): Bump elliptic from 6.5.7 to 6.6.0 in /experimenter (#11632)

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.7 to
6.6.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="b8a7edd61a"><code>b8a7edd</code></a>
6.6.0</li>
<li><a
href="34c853478c"><code>34c8534</code></a>
fix: signature verification due to leading zeros</li>
<li>See full diff in <a
href="https://github.com/indutny/elliptic/compare/v6.5.7...v6.6.0">compare
view</a></li>
</ul>
</details>
<br />


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experimenter/yarn.lock

@@ -7564,9 +7564,9 @@ elegant-spinner@^1.0.1:
   integrity sha1-2wQ1IcldfjA/2PNFvtwzSc+wcp4=
 
 elliptic@^6.5.3, elliptic@^6.5.4:
-  version "6.5.7"
-  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.7.tgz#8ec4da2cb2939926a1b9a73619d768207e647c8b"
-  integrity sha512-ESVCtTwiA+XhY3wyh24QqRGBoP3rEdDUl3EDUUo9tft074fi19IrdpH7hLCMMP3CIj7jb3W96rn8lt/BqIlt5Q==
+  version "6.6.0"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.6.0.tgz#5919ec723286c1edf28685aa89261d4761afa210"
+  integrity sha512-dpwoQcLc/2WLQvJvLRHKZ+f9FgOdjnq11rurqwekGQygGPsYSK29OMMD2WalatiqQ+XGFDglTNixpPfI+lpaAA==
   dependencies:
     bn.js "^4.11.9"
     brorand "^1.1.0"