security/obfs4proxy-tor: update core dependency, goptlib
lists.torproject.org/pipermail/anti-censorship-team/2020-September/000122.html
while here, also:
- update golang's libs
+ crypto
+ net
+ text
+ sys
- update "utls" lib from yawning's obfs4proxy-0.0.11 branch (GitLab)Sponsored by: TorBSD Diversity Project (TDP)
Sponsored by: The Tor Project