v1.2.3

fixes deprecation warnings

v1.2.2

migrates to new bindata format

v1.2.1

fixes an issue matching topics as length was calculated before normalising keys

v1.2.0

Enable will and clean session as connect params

v1.1.1

adds crystal version tag

v1.1.0

adds support for shared topic subscriptions

v1.0.2

support nil payloads
close transport on failed send

v1.0.0

implements the version 3 (/ 4) protocol