Missing fields in types structs not tested

[jamillambert]

Integration tests still pass if there are missing return fields in the JSON-RPC method structs in types.

e.g. types/src/v17/network/mod.rs:65 getnettotals, all the fields can be deleted and the test still passes:

#[test]
fn network__get_net_totals() {
    let node = Node::with_wallet(Wallet::None, &[]);
    let _: GetNetTotals = node.client.get_net_totals().expect("getnettotals");
}

NB. if there is an extra field or incorrectly named field the test does fail.

[jamillambert]

One solution is to add #[serde(deny_unknown_fields)] to each struct. This makes the test fail if there are fields returned that are not in the struct. I tried this and there are a lot. I fixed the ones in v17 in #243, and will work on the rest.

[tcharding]

I like this solution.

[jamillambert]

All of the missing fields have been added in #243, #251, #255, #267 and #272. And #273 adds the serde deny.