v4.21.0

• ⭐ Implemented a feature where you can add optional query params to every request
• ⭐ Updated developer setup documentation
• ⭐ Improved code checkstyle rules

v4.20.0

• ⭐ Fix a bug where the global-here-now response was incorrectly interpreted

v4.19.0

• ⭐Fix an issue where end of channel history was interpreted as an error

v4.18.0

• ⭐lock down okHTTP version to support latest android version

v4.17.0

• ⭐allow SDK to only send heartbeats without subscribing to the data channel.

v4.16.0

• ⭐allow setting setMaximumConnections to open more connections to PubNub

v4.15.0

• ⭐update gson dependency

• 🐛make listeners thread safe

• 🐛close hanging threads on shutdown

v4.14.0

• ⭐add support to supress leave events

v4.13.0

• ⭐do not execute subscribe on empty string channel, channel groups

• ⭐stop heartbeat loop if an error shows up.

v4.12.0

• 🐛fix worker thread unloading.
• 🌟prevent concurrent modification of listeners.