🚀 New release: Ergo protocol reference client 6.0.0-RC4 (v6.0.0-RC4)

This version is able to sync with the mainnet. For that, a couple of fixes done in 6.0.0 candidate:

* treeVersion <= activatedVersion checked since 5.0 activation only (as before there were some mainnet transactions violated the rule)

* initialization of some values in object SOption made lazy (to avoid null values somehow appearing in the node 6.0)

Check it out here: https://github.com/ergoplatform/ergo/releases/tag/v6.0.0-RC4