Merge pull request #10 from fulll/add_sf_6

Author: Kevin-koko

composer.json

@@ -10,8 +10,8 @@
         "homepage": "https://github.com/rezzza/command-bus-bundle/contributors"
     }],
     "require": {
-        "php": ">=5.5.0",
-        "symfony/event-dispatcher": "~2.5|~3.0|~4.0|~5.0",
+        "php": ">=7.4",
+        "symfony/event-dispatcher": "~4.0|~5.0|~6.0",
         "fulll/command-bus": "^3.5.1"
     },
     "repositories": [