Improve Revert Error Detection

[nlordell]

Follow up to cowprotocol/ethcontract-rs#872

This PR bumps the version of ethcontract to one that detects additional revert RPC errors from Nethermind that were previously being missed.

This should decrease alert noise as we were alerting on fetching owner token balances in the bad token detector that were reverting, but, now with the newer version of ethcontract, should be categorized as a REVERT and be handled accordingly (basically, it would not find a balance for that token).

Test Plan

Try out with a contract that was causing the issue (basically, it wasn't a token). Previously, trying to get a native token price for a specific address was causing an internal server error (which generates alert noise):

services main % curl -s https://api.cow.fi/mainnet/api/v1/token/0xb975debd497c1cc6cdcb9f4246ef4903e842671f/native_price | jq
{
  "errorType": "InternalServerError",
  "description": ""
}
services main % curl -s http://localhost:8080/api/v1/token/0xb975debd497c1cc6cdcb9f4246ef4903e842671f/native_price | jq
{
  "errorType": "InternalServerError",
  "description": ""
}

With the proposed change, this is no longer the case:

services bump-ethcontract % curl -s http://localhost:8080/api/v1/token/0xb975debd497c1cc6cdcb9f4246ef4903e842671f/native_price | jq    
{
  "errorType": "UnsupportedToken",
  "description": "Token address 0xb975debd497c1cc6cdcb9f4246ef4903e842671f"
}