Use bdk_chain Balance

instead of bdk's one

tests/wallet.rs

@@ -3,9 +3,7 @@ use bdk::descriptor::calc_checksum;
 use bdk::signer::{SignOptions, SignerError};
 use bdk::wallet::coin_selection::LargestFirstCoinSelection;
 use bdk::wallet::AddressIndex::*;
-use bdk::wallet::AddressInfo;
-use bdk::wallet::{AddressIndex, Wallet};
-use bdk::Balance;
+use bdk::wallet::{AddressIndex, AddressInfo, Balance, Wallet};
 use bdk::Error;
 use bdk::FeeRate;
 use bdk::KeychainKind;