change web3j-core version for exception

Helius

2022-07-22 8bcab114f9935c2f8477791490e2894e9b7ee708

 src/main/java/cc/mrbird/febs/dapp/chain/ContractChainService.java

@@ -24,4 +24,6 @@
    BigInteger blockNumber();

    BigInteger totalSupply();

    String safeMintNFT(String toAddress);
}