Bump mocha from 8.3.2 to 8.4.0

Bumps [mocha](https://github.com/mochajs/mocha) from 8.3.2 to 8.4.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v8.3.2...v8.4.0)
Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -68,7 +68,7 @@
     "katex": "^0.13.0",
     "lodash.debounce": "^4.0.3",
     "loose-envify": "^1.4.0",
-    "mocha": "8.3.2",
+    "mocha": "8.4.0",
     "mustache": "^4.0.1",
     "mustache-express": "^1.3.0",
     "npm-packlist": "^2.0.1",

yarn.lock

@@ -5644,10 +5644,10 @@ mkdirp@^1.0.4:
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-1.0.4.tgz#3eb5ed62622756d79a5f0e2a221dfebad75c2f7e"
   integrity sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==
 
-mocha@8.3.2:
-  version "8.3.2"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-8.3.2.tgz#53406f195fa86fbdebe71f8b1c6fb23221d69fcc"
-  integrity sha512-UdmISwr/5w+uXLPKspgoV7/RXZwKRTiTjJ2/AC5ZiEztIoOYdfKb19+9jNmEInzx5pBsCyJQzarAxqIGBNYJhg==
+mocha@8.4.0:
+  version "8.4.0"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-8.4.0.tgz#677be88bf15980a3cae03a73e10a0fc3997f0cff"
+  integrity sha512-hJaO0mwDXmZS4ghXsvPVriOhsxQ7ofcpQdm8dE+jISUOKopitvnXFQmpRR7jd2K6VBG6E26gU3IAbXXGIbu4sQ==
   dependencies:
     "@ungap/promise-all-settled" "1.1.2"
     ansi-colors "4.1.1"