lang: Use official borsh crate

Cargo.lock

@@ -165,7 +165,7 @@ dependencies = [
  "anchor-attribute-program",
  "anchor-attribute-state",
  "anchor-derive-accounts",
- "serum-borsh",
+ "borsh",
  "solana-program",
  "thiserror",
 ]

lang/Cargo.toml

@@ -19,6 +19,6 @@ anchor-attribute-program = { path = "./attribute/program", version = "0.3.0" }
 anchor-attribute-state = { path = "./attribute/state", version = "0.3.0" }
 anchor-attribute-interface = { path = "./attribute/interface", version = "0.3.0" }
 anchor-derive-accounts = { path = "./derive/accounts", version = "0.3.0" }
-serum-borsh = "0.8.1-serum.1"
+borsh = "0.8.2"
 solana-program = "=1.5.15"
 thiserror = "1.0.20"