ContractError::Revert excludes message and error code

[mattsse]

opening this to track

#2172 introduced ContractError::Revert,

the from_middleware_err functions only extracts the data:

ethers-rs/ethers-contract/src/call.rs

Line 120 in 7e12f3b

if let Some(data) = e.as_error_response().and_then(JsonRpcError::as_revert_data) {

but the message and error code can contain additional context besides "reverted".

Suggestion:

• add RevertErr(JsonRpcError) new type that is used by the Revert
• custom impl Display for RevertErr with attempt to decode revert data

@prestwich