Modified PNReconnectionPolicy (#297)

* Modified PNReconnectionPolicy
Added random value 0,001-0,999s to delay between retry both for Linear and Exponential reconnection policies.

* PubNub SDK v6.4.5 release.
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Co-authored-by: PubNub Release Bot <[email protected]>

Move kt file to kotlin sourceset (#296)

* Move kt file to kotlin sourceset

* PubNub SDK v6.4.4 release.

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

Add error field to file result and set on decrypt error (#294)

* Add error field to file result and set on decrypt error

* PubNub SDK v6.4.3 release.

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

Remove 'contact support' in case of network error. (#292)

* Remove 'contact support' in case of network error.

* PubNub SDK v6.4.2 release.

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

Changed license type from MIT to PubNub Software Development Kit Lice…

…nse (#287)

* Changed license type from MIT to PubNub Software Development Kit License

* Updated the JSON library to version 20231013

* PubNub SDK v6.4.1 release.

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

Used new CryptoModule from kotlin SDK. (#280)

fix: Improve security of crypto implementation. 

Improved security of crypto implementation by adding enhanced AES-CBC cryptor

feat: Add crypto module

Add crypto module that allows configure SDK to encrypt and decrypt messages. 

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

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.

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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.