chore: marked contract and web3 variables in class 'web3contract' as 'public let';

Author: JeneaVranceanu

Sources/web3swift/Web3/Web3+Contract.swift

@@ -17,8 +17,8 @@ extension web3 {
 
     /// Web3 instance bound contract instance.
     public class web3contract {
-        private(set) public var contract: EthereumContract
-        var web3: web3
+        public let contract: EthereumContract
+        public let web3: web3
         public var transactionOptions: TransactionOptions? = nil
 
         /// Initialize the bound contract instance by supplying the Web3 provider bound object, ABI, Ethereum address and some default