restrict validator

info

.NET 6.0 (neo-project#2627)

* .NET 6.0

* Fix opcode prices

* Fix UPnP

* Update main.yml

* Update akka

* Fix UT for Microsoft.EntityFrameworkCore.Sqlite 6.0.0

3.0.3

3.0.2

3.0.1

3.0.0 (neo-project#2554)

3.0.0-rc4 (neo-project#2550)

3.0.0-rc3 (neo-project#2482)

3.0.0-rc2 (neo-project#2459)