[dompurify] dompurify vulnerable to Cross-site Scripting

dompurify prior to version 2.2.3 is vulnerable to a cross-site scripting problem caused by nested headlines.

References

• https://github.com/cure53/DOMPurify/releases/tag/2.2.3
• https://security.snyk.io/vuln/SNYK-JS-DOMPURIFY-2863266
• https://www.vidocsecurity.com/blog/hacking-swagger-ui-from-xss-to-account-takeovers/
• https://github.com/advisories/GHSA-h6p3-p4vx-wr8q