Update dependency io.undertow:undertow-core to v2.2.20.Final (#98)
Update dependency io.undertow:undertow-core to v2.2.20.Final (#98)

Co-authored-by: renovate[bot] <1d2c67ad0e3429d16690809152e1083ff6af8a05@users.noreply.github.com>
pac4j/undertow-pac4j-demo,pac4j/undertow-pac4j-demo