chore: update code

src/helper/hook-helper.ts

@@ -390,7 +390,8 @@ function runOneHook<
   if (hook.awaitPromise) {
     promise = promise || Promise.resolve();
     promise = promise.then(() => {
-      // notice: here we return hook's result, and the return statement on the next will return undefined.
+      // notice: here we return hook's result
+      //         and the return statement on the next condition branch will return undefined.
       return hook.hook(joinPoint);
     });
   } else if (promise) {

src/injector.ts

@@ -386,19 +386,19 @@ export class Injector {
               return instance;
             };
 
-            const preprocessedHooks: IValidAspectHook[] = hookMetadata.map((metadata) => {
+            const preprocessedHooks = hookMetadata.map((metadata) => {
               const wrapped = (...args: any[]) => {
                 const instance = getInstance();
                 return instance[metadata.prop].call(instance, ...args);
               };
               return {
                 awaitPromise: metadata.options.await,
-                priority: metadata.options.priority || 0,
+                priority: metadata.options.priority,
                 hook: wrapped,
                 method: metadata.targetMethod,
                 target: metadata.target,
                 type: metadata.type,
-              };
+              } as IValidAspectHook;
             });
             toDispose = this.hookStore.createHooks(preprocessedHooks);
           }