modify parser export

src/parser/index.ts

@@ -2,3 +2,9 @@ export * from './generic';
 export * from './plsql';
 export * from './hive';
 export * from './flinksql';
+export * from './spark';
+export { default as GenericSQL } from './generic';
+export { default as PLSQL } from './plsql';
+export { default as HiveSQL } from './hive';
+export { default as FlinkSQL } from './flinksql';
+export { default as SparkSQL } from './spark';