Version 4.11.0 (#662)

Merge pull request #598 from zeromq/gummif-patch-1

Version 4.10.0

Merge pull request #577 from gummif/gfa/release-4.9.0

Version 4.9.0

Release v4.8.1

Release v4.8.0

Bump version number to 4.7.1 for bugfix release

Merge pull request #399 from gummif/gfa/message-ctor

Problem: message_t ctor string inconsistency

Merge pull request #374 from gummif/patch-2

Problem: Invalid 32bit issues when using Conan

Merge pull request #357 from gummif/gfa/nodiscard-recv

Problem: recv return value should not be ignored

Update version to 4.4.1