Add MaxFeePerGas and MaxPriorityFeePerGas to Transactions

[juanfranblanco]

As an example this will need to be included in Transaction in EF builder https://github.com/Nethereum/Nethereum.BlockchainStorage/blob/master/src/Nethereum.BlockchainStore.EF/EntityBuilders/TransactionEntityBuilder.cs

Azure table storage https://github.com/Nethereum/Nethereum.BlockchainStorage/blob/master/src/Nethereum.BlockchainStore.AzureTables/Entities/TransactionBase.cs

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