Adding command to update autoloader files

composer.md

@@ -39,6 +39,11 @@ local dependencies to the last committed state. If that file is modified on the
 
 This command changes only the `composer.lock` file.
 
+### Updating autoloader
+| Command                                       | Description                     |
+| ---                                           | ---                             |
+| `composer dumpautoload -o`                             | Generates optimized autoload files             |
+
 ### Adding packages
 
 | Command                          | Description                                                 |