refactor: set requirements

composer.json

@@ -19,8 +19,9 @@
         "url": "http:\/\/www.pcsg.de"
     },
     "require": {
-        "php": ">=5.3",
-        "quiqqer\/quiqqer": "*@dev",
+        "php": ">=7.0",
+        "quiqqer\/quiqqer": "=>1.4|dev-master|dev-dev",
+        "quiqqer\/erp": "^1|dev-master|dev-dev",
         "quiqqer\/countries": "*",
         "quiqqer\/areas": "*",
         "quiqqer\/products": "*",
@@ -38,4 +39,4 @@
             "QUITests\\ERP\\Order\\": "tests\/QUITests\/ERP\/Order"
         }
     }
-}
\ No newline at end of file
+}