Upgrade fast-xml-parser to 4.2.0

[spriggyjeff]

Addresses https://security.snyk.io/vuln/SNYK-JS-FASTXMLPARSER-3325616

Summary

Upgrades fast-xml-parser from 3.20.3 to 4.2.0 to address https://security.snyk.io/vuln/SNYK-JS-FASTXMLPARSER-3325616

Checklist

• The basics
  • I tested these changes manually in my local or dev environment
• Tests
  • Added or updated
  • N/A
• Event Tracking
  • I added event tracking and followed the event tracking guidelines
  • N/A
• Error Reporting
  • I reported errors and followed the error reporting guidelines
  • N/A

Additional context

I haven't tested extensively, but the tests pass. The only breaking change upstream appeared to be the renaming of j2xParser and its parse method to XMLBuilder and build respectively.