chore: re-export fastnum and update crate version (#102)

`fastnum` is now included to support the `BigInt` type via `fastnum::I512`. Updated the version in `Cargo.toml` from `4.0.0-rc` to `4.0.0-rc1` to reflect the changes.

Author: shuhuiluo

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "uniswap-sdk-core"
-version = "4.0.0-rc"
+version = "4.0.0-rc1"
 edition = "2021"
 authors = ["malik <aremumalik05@gmail.com>", "Shuhui Luo <twitter.com/aureliano_law>"]
 description = "The Uniswap SDK Core in Rust provides essential functionality for interacting with the Uniswap decentralized exchange"

src/lib.rs

@@ -49,6 +49,7 @@ pub mod prelude {
     pub use alloc::{string::String, vec::Vec};
     pub use alloy_primitives::{map::rustc_hash::FxHashMap, Address, Bytes, B256, U256};
     pub use bnum;
+    pub use fastnum;
     pub use num_integer::Integer;
 
     pub type BigInt = fastnum::I512;