Update monero-oxide to the branch with the new RPC

See https://github.com/monero-oxide/monero-oxide/pull/66.

Allows us to remove the shim `simple-request 0.1` we had to define as we now
have `simple-request 0.2` in tree.

processor/monero/src/primitives/block.rs

@@ -4,7 +4,8 @@ use ciphersuite::*;
 use dalek_ff_group::Ed25519;
 
 use monero_wallet::{
-  block::Block as MBlock, rpc::ScannableBlock as MScannableBlock, ScanError, GuaranteedScanner,
+  block::Block as MBlock, interface::ScannableBlock as MScannableBlock, ScanError,
+  GuaranteedScanner,
 };
 
 use serai_client::networks::monero::Address;