add export

index.ts

@@ -4,6 +4,7 @@ export * from "./lib/delta";
 export * from "./lib/graph_state";
 export * from "./lib/types";
 export * from "./lib/version";
+export * from "./lib/version_parser";
 
 export * from "./lib/util/buffer_xor";
 export * from "./lib/util/dfs";