fix autoload and symfony version

Author: okaufmann

composer.json

@@ -24,15 +24,15 @@
     "illuminate/contracts": "^7.0",
     "illuminate/support": "^7.0",
     "irazasyed/telegram-bot-sdk": "^3.0",
-    "symfony/yaml": "3.*"
+    "symfony/yaml": "5.*"
   },
   "require-dev": {
     "phpstan/phpstan": "^0.12.32"
   },
   "extra": {
     "laravel": {
       "providers": [
-        "BotDialogs\\Laravel\\DialogsServiceProvider"
+        "BotDialogs\\DialogsServiceProvider"
       ]
     }
   },