build(deps): bump dompurify from 2.4.9 to 3.1.6

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.4.9 to 3.1.6.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](cure53/DOMPurify@2.4.9...3.1.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -34,7 +34,7 @@
     "chart.js": "2.9.4",
     "core-js": "3.36.1",
     "css-vars-ponyfill": "2.4.9",
-    "dompurify": "2.4.9",
+    "dompurify": "3.1.6",
     "flexver": "1.1.1",
     "font-awesome": "4.7.0",
     "imurmurhash": "0.1.4",