composer: Set upper bound to 7.4.x for deployer/deployer

Author: tdgroot

composer.json

@@ -16,7 +16,7 @@
         "hipex/deploy-configuration": "*"
     },
     "require": {
-        "deployer/deployer": "^7.0",
+        "deployer/deployer": "7.0 - 7.4",
         "psr/log": "^1.0||^2.0||^3.0"
     }
 }