This update for zeromq fixes the following issues:

- CVE-2020-15166: Fixed the possibility of unauthenticated clients causing a denial-of-service (bsc#1176116).
- Fixed a heap overflow when receiving malformed ZMTP v1 packets (bsc#1176256)
- Fixed a memory leak in client induced by malicious server(s) without CURVE/ZAP (bsc#1176257)
- Fixed memory leak when processing PUB messages with metadata (bsc#1176259)
- Fixed a stack overflow in PUB/XPUB subscription store (bsc#1176258)