fix (anvil): error E0063 when compile on macOS due to alloy-rs

[p3nj]

Motivation

An error occurs when Anvil is compiled from the crates/ directory as instructed. The error message states that the base_fee_per_blob_gas and blob_gas_used_ratio fields are missing in the alloy_rpc_types::FeeHistory initializer. This error is caused by recent changes made to the FeeHistory struct in alloy-rs fee.rs.
Here is the error message for reference:

Compiling anvil v0.2.0 (/Users/benji/Develop/blockchain/foundry/crates/anvil)
error[E0063]: missing fields base_fee_per_blob_gas and blob_gas_used_ratio in initializer of alloy_rpc_types::FeeHistory
--> crates/anvil/src/eth/[api.rs:1312](http://api.rs:1312/):28
|
1312 |         let mut response = FeeHistory {
|                            ^^^^^^^^^^ missing base_fee_per_blob_gas and blob_gas_used_ratio
For more information about this error, try rustc --explain E0063.
error: could not compile anvil (lib) due to previous error

Solution

Update the README.md file and modify the install command by including the --offline and --locked flags to ensure Cargo utilizes locally cached crates and avoids fetching newer versions from the internet.