Depends on vulnerable version of fast-xml-parser

[TMInnovations]

Describe the bug
This repo has a dependency on fast-xml-parser version ^3.17.4. An update to version 4.4.0 would be necessary regarding to npm audit

To Reproduce
npm i nextcloud-node-client && npm audit

Expected behavior
It should not depend on vulnerable versions of other npm packages.

Additional context
For migration, the CHANGELOG.md file of fast-xml-parser can help.