security/botan2: Update to 2.11.0

[dmgk]

Summary

security/botan2: Update to 2.11.0

Bump PORTREVISION of ports depending on security/botan2

Changes: https://botan.randombit.net/news.html#version-2-11-0-2019-07-01

PR: 240557
Submitted by: Ralf van der Enden <[e-mail]> (maintainer)

Test Plan

poudriere testport: OK (113a, 120i, 120a)
poudriere bulk of depending ports: OK (120a)
portlint -AC: OK

[araujo]

You should do two commits for this review, first commit security/botan2 and then commit the BUMP for the other ports that depends of security/botan2.