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:development
  update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>

yarn.lock

@@ -2837,9 +2837,9 @@ domhandler@^2.3.0:
     domelementtype "1"
 
 dompurify@^2.0.1:
-  version "2.3.8"
-  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.3.8.tgz#224fe9ae57d7ebd9a1ae1ac18c1c1ca3f532226f"
-  integrity sha512-eVhaWoVibIzqdGYjwsBWodIQIaXFSB+cKDf4cfxLMsK0xiud6SE+/WCVx/Xw/UwQsa4cS3T2eITcdtmTg2UKcw==
+  version "2.3.9"
+  resolved "https://registry.yarnpkg.com/dompurify/-/dompurify-2.3.9.tgz#a4be5e7278338d6db09922dffcf6182cd099d70a"
+  integrity sha512-3zOnuTwup4lPV/GfGS6UzG4ub9nhSYagR/5tB3AvDEwqyy5dtyCM2dVjwGDCnrPerXifBKTYh/UWCGKK7ydhhw==
 
 domutils@1.5.1:
   version "1.5.1"