fix: upgrade isomorphic-dompurify from 2.16.0 to 2.20.0

Snyk has created this PR to upgrade isomorphic-dompurify from 2.16.0 to 2.20.0.

See this package in npm:
isomorphic-dompurify

See this project in Snyk:
https://app.snyk.io/org/nialljoemaher/project/8ac19f6c-c7f2-4720-acd1-09701979877c?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot