Merge pull request #14527 from ja-pa/czmq-4.2.1
authorRosen Penev <rosenp@gmail.com>
Fri, 22 Jan 2021 21:30:58 +0000 (13:30 -0800)
committerGitHub <noreply@github.com>
Fri, 22 Jan 2021 21:30:58 +0000 (13:30 -0800)
czmq: update to version 4.2.1


Trivial merge