metadata.json: require Puppet 7

The module dependencies (apt, stdlib, inifile) require Puppet 7.

Author: kenyon

metadata.json

@@ -75,7 +75,7 @@
   "requirements": [
     {
       "name": "puppet",
-      "version_requirement": ">= 5.0.0 < 9.0.0"
+      "version_requirement": ">= 7.0.0 < 9.0.0"
     }
   ],
   "pdk-version": "3.2.0",