Bump dompurify from 2.3.8 to 2.3.9

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.3.8 to 2.3.9.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.3.8...2.3.9)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -14,7 +14,7 @@
         "@fortawesome/free-solid-svg-icons": "^6.1.1",
         "@fortawesome/vue-fontawesome": "^3.0.1",
         "buffer": "^6.0.3",
-        "dompurify": "^2.3.8",
+        "dompurify": "^2.3.9",
         "hotkeys-js": "^3.9.4",
         "javascript-time-ago": "^2.5.6",
         "mux.js": "^6.1.0",

yarn.lock

@@ -1677,10 +1677,10 @@ dom-walk@^0.1.0:
   resolved "https://registry.yarnpkg.com/dom-walk/-/dom-walk-0.1.2.tgz#0c548bef048f4d1f2a97249002236060daa3fd84"
   integrity sha512-6QvTW9mrGeIegrFXdtQi9pk7O/nSK6lSdXW2eqUspN5LWD7UTji2Fqw5V2YLjBpHEoU9Xl/eUWNpDeZvoyOv2w==
 
-dompurify@^2.3.8:
-  version "2.3.8"
-  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.3.8.tgz#224fe9ae57d7ebd9a1ae1ac18c1c1ca3f532226f"
-  integrity sha512-eVhaWoVibIzqdGYjwsBWodIQIaXFSB+cKDf4cfxLMsK0xiud6SE+/WCVx/Xw/UwQsa4cS3T2eITcdtmTg2UKcw==
+dompurify@^2.3.9:
+  version "2.3.9"
+  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.3.9.tgz#a4be5e7278338d6db09922dffcf6182cd099d70a"
+  integrity sha512-3zOnuTwup4lPV/GfGS6UzG4ub9nhSYagR/5tB3AvDEwqyy5dtyCM2dVjwGDCnrPerXifBKTYh/UWCGKK7ydhhw==
 
 ejs@^3.1.6:
   version "3.1.7"