chore: add license to preprocessor deploy helper (#10684)

chore: add license to prepreocessor deploy helper

Author: grandizzy

crates/common/src/preprocessor/data.rs

@@ -178,6 +178,7 @@ impl ContractData {
 
         let helper = format!(
             r#"
+// SPDX-License-Identifier: MIT
 pragma solidity >=0.4.0;
 
 import "{path}";