Drop puppet and openvox 7 support

Recent versions of puppetlabs-apt have dropped ruby 2.7 support
with:

puppetlabs/puppetlabs-apt@3f9afe6

Author: traylenator

metadata.json

@@ -82,11 +82,11 @@
   "requirements": [
     {
       "name": "puppet",
-      "version_requirement": ">= 7.0.0 < 9.0.0"
+      "version_requirement": ">= 8.0.0 < 9.0.0"
     },
     {
       "name": "openvox",
-      "version_requirement": ">= 7.0.0 < 9.0.0"
+      "version_requirement": ">= 8.0.0 < 9.0.0"
     }
   ]
 }