Bump dompurify from 2.0.17 to 2.2.2 in /frontend

[dependabot-preview[bot]]

Bumps dompurify from 2.0.17 to 2.2.2.

Release notes

Sourced from dompurify's releases.

DOMPurify 2.2.2

• Fixed an mXSS bypass dropped on us publicly via #482
• Fixed an mXSS variation that was reported privately short after
• Added dialog to permitted elements list
• Fixed a small typo in the README

DOMPurify 2.2.0

• Fix a possible XSS in Chrome that is hidden behind #enable-experimental-web-platform-features, reported by @neilj and @mfreed7
• Changed RETURN_DOM_IMPORT default to true to address said possible XSS
• Updated README to reflect the new change and inform about the risks of manually setting RETURN_DOM_IMPORT back to false
• Fixed the tests to properly address the new default

DOMPurify 2.1.1

• Removed some code targeting old Safari versions
• Removed some code targeting older MS Edge versions
• Re-added some code targeting older Chrome versions, thanks @terjanq
• Added new tests and removed unused SAFE_FOR_JQUERY test cases
• Added Node 14.x to existing test coverage

DOMPurify 2.1.0

• Fixed several possible mXSS patterns, thanks @hackvertor
• Removed the SAFE_FOR_JQUERY flag (we are safe by default now for jQuery)
• Removed several now useless mXSS checks
• Updated the mXSS check for elements
• Updated test cases to cover new sanitization strategy
• Updated test website to use newer jQuery
• Updated array of tested browsers and removed legacy browsers
• Added "auto convert" checkbox to test website, thanks @hackvertor

Commits

• 7923e10 chore: Preparing 2.2.2 release
• 7719c5b test: Added test cases for reported bypasses
• e43de71 fix: squished another variation of the mXSS
• 0771f47 chore: Preparing 2.2.1 release
• ee33fae fix: Fixed a mXSS bypass reported in #482
• e95b0de see #480
• 83b7acb See #479
• 0e31dce chore: preparing 2.2.0 release
• 307c7d0 test: added tests to cover new RETURN_DOM_IMPORT default being true
• 5aab0bb fix: fixed a typo in the config option logic for DOM_RETURN_IMPORT
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #98.