v5.4.2

Change log:

c4ed335 Upgrade dependencies; prepare for release
4909f03 GH-3434: Optimize unlinkAvailable in Redis
97e1692 Fix some Sonar smells
c12acb9 Fix FluxMessCh for subscription race condition
efcc018 Some miscellaneous fixes
63bd3e4 Some miscellaneous docs related fixed
a12306b Clean repositories in build script