Fix alchemy endpoint json rpc parameters

[IdoBn]

When running the following command (present in the README.md):

./mev inspect 12914944

We get the following output:

Inspecting block 12914944
Skipping virtualenv creation, as specified in config file.
ERROR:mev_inspect.retry:Request for method eth_getBlockReceipts, params: (12914944,), retrying: 0/5
ERROR:mev_inspect.retry:Request for method eth_feeHistory, params: (1, '0xc51100', None), retrying: 0/5
ERROR:mev_inspect.retry:Request for method eth_feeHistory, params: (1, '0xc51100', None), retrying: 1/5
ERROR:mev_inspect.retry:Request for method eth_getBlockReceipts, params: (12914944,), retrying: 1/5

These errors are a result of bad parameters passed to the json-rpc endpoint on some nodes. In my case this was an alchemy node.

[maxholloway]

In the README it says that the RPC node must support erigon traces and receipts. Does alchemy support erigon receipts? If not, you might try making an RPC endpoint through pokt.network.