Update pac4j.version to v4.2.0 (#24)
Update pac4j.version to v4.2.0 (#24)

Co-authored-by: Renovate Bot <c71e7261d37a4f6ae4cfb0cbd79081310a237e67@renovateapp.com>
pac4j/undertow-pac4j-demo,pac4j/undertow-pac4j-demo