refactor: composer cleanup

composer.json

 {
-  "name": "quiqqer\/discount",
+  "name": "quiqqer/discount",
   "type": "quiqqer-plugin",
   "description": "Create discounts for user groups, specific users as well as time controlled.",
   "license": [
@@ -9,25 +9,25 @@
     {
       "name": "Henning Leutz",
       "email": "leutz@pcsg.de",
-      "homepage": "http:\/\/www.pcsg.de",
+      "homepage": "https://www.pcsg.de",
       "role": "Developer"
     }
   ],
   "support": {
     "email": "support@pcsg.de",
-    "url": "http:\/\/www.pcsg.de"
+    "url": "https://www.pcsg.de"
   },
   "require": {
     "php": "^8.2",
-    "quiqqer\/core": "^2",
-    "quiqqer\/areas": "^1",
-    "quiqqer\/products": "^2",
-    "quiqqer\/tax": "^1"
+    "quiqqer/core": "^2",
+    "quiqqer/areas": "^2",
+    "quiqqer/products": "^2",
+    "quiqqer/tax": "^2"
   },
   "autoload": {
     "psr-4": {
-      "QUI\\ERP\\Discount\\": "src\/QUI\/ERP\/Discount",
-      "QUITests\\ERP\\Discount\\": "tests\/QUITests\/ERP\/Discount"
+      "QUI\\ERP\\Discount\\": "src/QUI/ERP/Discount",
+      "QUITests\\ERP\\Discount\\": "tests/QUITests/ERP/Discount"
     }
   }
 }