chore: clippy warnings

crates/uplc/src/flat.rs

@@ -82,7 +82,7 @@ where
     pub fn to_hex(&self) -> Result<String, en::Error> {
         let bytes = self.to_cbor()?;
 
-        let hex = hex::encode(&bytes);
+        let hex = hex::encode(bytes);
 
         Ok(hex)
     }

crates/uplc/src/parser.rs

@@ -124,7 +124,7 @@ peg::parser! {
           = "(" _* "error" _* ")" { Term::Error }
 
         rule constant_integer() -> Constant
-          = "integer" _+ i:big_number() { Constant::Integer(i as i128) }
+          = "integer" _+ i:big_number() { Constant::Integer(i) }
 
         rule constant_bytestring() -> Constant
           = "bytestring" _+ bs:bytestring() { Constant::ByteString(bs) }