feat: v0.5.5 - enhanced priority fee system and dependency updates

- Update solana-streamer-sdk to 0.4.1
- Refactor priority fee API (custom_buy_tip_fee → custom_priority_fee)
- Simplify documentation and clean up examples

BREAKING CHANGE: priority fee parameter type changed

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sol-trade-sdk"
-version = "0.5.4"
+version = "0.5.5"
 edition = "2021"
 authors = [
     "William <byteblock6@gmail.com>",
@@ -32,7 +32,7 @@ members = [
 crate-type = ["cdylib", "rlib"]
 
 [dependencies]
-solana-streamer-sdk = "0.3.10"
+solana-streamer-sdk =  "0.4.1"
 solana-sdk = "2.3.0"
 solana-client = "2.3.6"
 solana-program = "2.3.0"