rm version- and add php constrain

composer.json

@@ -2,7 +2,6 @@
   "name": "d3/categorylongtext",
   "description": "2. Kategorie Langtext",
   "type": "oxideshop-module",
-  "version": "1.0.0",
   "keywords": [
     "oxid",
     "modules",
@@ -30,6 +29,7 @@
     }
   },
   "require": {
+    "php": "^7",
     "oxid-esales/oxideshop-ce":"^6"
   },
   "autoload": {