Update composer.json

composer.json

@@ -3,7 +3,7 @@
     "description": "A generic user registration and authentication module for ZF2. Supports Laminas\\Db and Doctrine2.",
     "type": "library",
     "require": {
-        "php": "^5.5|^7.0",
+        "php": "^7.4",
         "laminas/laminas-authentication": "^2.5",
         "laminas/laminas-crypt": "^3.0",
         "laminas/laminas-form": "^2.17",