chore(deps): bump xmlschema from 1.11.3 to 2.3.1

Bumps [xmlschema](https://github.com/sissaschool/xmlschema) from 1.11.3 to 2.3.1.
- [Release notes](https://github.com/sissaschool/xmlschema/releases)
- [Changelog](https://github.com/sissaschool/xmlschema/blob/master/CHANGELOG.rst)
- [Commits](sissaschool/xmlschema@v1.11.3...v2.3.1)

---
updated-dependencies:
- dependency-name: xmlschema
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>