Bump dompurify from 2.5.6 to 3.2.4

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.5.6 to 3.2.4.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.5.6...3.2.4)

---
updated-dependencies:
- dependency-name: dompurify
  dependency-type: direct:production
...

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

package.json

@@ -28,7 +28,7 @@
     "ajv": "^6.12.6",
     "bcryptjs": "^2.4.3",
     "bson": "^4.5.2",
-    "dompurify": "^2.5.6",
+    "dompurify": "^3.2.4",
     "es6-promise": "^4.2.4",
     "escape-string-regexp": "^5.0.0",
     "fibers": "^5.0.3",