fix: ERC20BaseProperties are back to inherit from AnyObject (restricting protocol to classes)

Author: JeneaVranceanu

Sources/web3swift/Tokens/ERC20/ERC20BaseProperties.swift

@@ -9,7 +9,7 @@ import Foundation
 
 /// Declares common properties of an [ERC-20](https://eips.ethereum.org/EIPS/eip-20) complient smart contract.
 /// Default implementation of access to these properties is declared in the extension of this protocol.
-public protocol ERC20BaseProperties: Any {
+public protocol ERC20BaseProperties: AnyObject {
     var basePropertiesProvider: ERC20BasePropertiesProvider { get }
     var contract: Web3.Contract { get }
     var name: String? { get }