ENGCOM-2315: Add generated code to the psr-0 autoloader section so when optimizing… #16435

 - Merge Pull Request #16435 from hostep/magento2:optimize-composer-autoloader-a-bit-more-2.2
 - Merged commits:
   1. 1dd90a5

Author: magento-engcom-team

composer.json

@@ -242,7 +242,8 @@
         },
         "psr-0": {
             "": [
-                "app/code/"
+                "app/code/",
+                "generated/code/"
             ]
         },
         "files": [