v0.7.0

Breaking change: AccountHolderCreateParams.Kyb & AccountHolderCreateParams.Kyc have been moved to their own classes, you should now use them directly, e.g. Kyb.builder()

• set default account holder create timeout to 5 minutes
• adds balances, aggregate balances, financial accounts & responder endpoints APIs
• miscellaneous API updates
• adds support for proxies