Added possibility to set state using heartbeat endpoint. (#277)

* Added possibility to set state using heartbeat endpoint.
* PubNub SDK v6.3.6 release.

Add heartbeat error limit (#275)

* Add heartbeat error limit

In case of any problems we should not quit immediately heartbeat calls.
The interval is chosen so it's possible to call heartbeat 3 times
during one presence interval, therefore we should keep trying at least
few more times

* PubNub SDK v6.3.5 release.

---------

Co-authored-by: PubNub Release Bot <[email protected]>

Upgraded json lib (#272)

* Upgraded json lib
* PubNub SDK v6.3.4 release.

Upgraded jackson-databind lib to remove sec vulnerabilities. (#271)

* Upgraded jackson-databind lib to remove sec vulnerabilities.

Undeprecated Grant Token methods. (#270)

fix: Remove deprecation for Grant Token methods.

Do not read body if it's null (#256)

Upgraded okhttp lib to 4.9.3 (#252)

refactor: Upgrade OkHttp lib to 4.9.3
feat: Added acceptance tests for ObjectsV2 feature
feat: Added possibility to add status when setting ChannelMembers
feat: Added status and type to query parameters for objectV2 REST calls. For membership and member only status

 Expose jsonMessage for file events (#246)

Extract message processing to simplify the design (and tests)

Dependencies version bump

Upgraded gson to 2.9.0 (#240)

* Upgraded gson to 2.9.0

Following error occurred:
“java.lang.reflect.InaccessibleObjectException: Unable to make private java.util.Collections$EmptyMap() accessible: module java.base does not “opens java.util” to unnamed module @4387b79e”

Explanation:
"The reason why this is causing an exception for JDK 17 is because JDK internals are now strongly encapsulated (see JEP 403).
 In general you should avoid using reflection based serialisation and deserialisation for classes which you do not control because you rely on their implementation details which could change at any point."

* Disable HTML escaping in gson