Switch to explicit imports in unified.rs mod tests

Author: chuksys

src/payment/unified.rs

@@ -373,8 +373,7 @@ impl DeserializationError for Extras {
 
 #[cfg(test)]
 mod tests {
-	use super::*;
-	use crate::payment::unified::Extras;
+	use super::{Amount, Bolt11Invoice, Extras, Offer};
 	use bitcoin::{address::NetworkUnchecked, Address, Network};
 	use std::str::FromStr;