docs(README.md): update examples.

Author: sciborrudnicki

README.md

@@ -53,29 +53,44 @@ const middleware = new Middleware();
 
 // Add middleware.
 middleware.use((args, next) => {
-  console.log('Middleware executed with args:', args);
+  console.log('Middleware 1 executed with args:', args);
+
+  // Modify args.
+  args[0].newKey = 'newValue';
+
+  // Execute next.
   next();
 });
 
 middleware.use((args, next) => {
-  console.log('Middleware executed with args:', args);
-  args[0].newKey = 'newValue';
+  console.log('Middleware 2 executed with args:', args);
+
+  // Execute next.
   next();
 });
 
+// logs
+// Middleware 1 executed with args: [ { key: 'value' } ]
+// Middleware 2 executed with args: [ { key: 'value', newKey: 'newValue' } ]
 middleware.execute({ key: 'value' });
 
 
-// Async.
+// Async
 middleware.use(async (args, next) => {
-  console.log('Async middleware start with args:', args);
+  console.log('Async middleware 1 start with args:', args);
+  args[0].newKey = 'newValue';
   await new Promise(resolve => setTimeout(resolve, 2000));
   console.log('Async middleware end');
   next();
 });
 
+middleware.use(async (args, next) => {
+  console.log('Async middleware 2 start with args:', args);
+  next();
+});
+
 middleware.onComplete((args) => {
-  console.log('All middleware completed with args:', args);
+  console.log('All middlewares completed with args:', args);
 });
 
 middleware.executeAsync({ key: 'value' });