🚀 New release: Ergo Protocol Reference Client 5.0.21 (v5.0.21)

Ergo reference protocol 5.0.21

* #2100 - fix for large integer overflows in swagger-ui

* #2113 - refactoring of Message class hierarchy (p2p messages)

* #2116 - a fix for ErgoStateContextSpec sporadic failures

* #2119 - better error message for wallet unlocking failure

* #2125 - token burning added to panel UI

* #2132 - ergo-core tests reffactoring

* #2135 - fix for ergo-core publishing in build.sbt

* #2139 - fixes for integrations tests

Contributors: @ccellado @deadit @salmanahmad22 @SethDusek @stenolog

Check it out here: https://github.com/ergoplatform/ergo/releases/tag/v5.0.21