Add Puppet 8 support

Author: bastelfreak

metadata.json

@@ -35,7 +35,7 @@
   "requirements": [
     {
       "name": "puppet",
-      "version_requirement": ">= 7.0.0 < 8.0.0"
+      "version_requirement": ">= 7.0.0 < 9.0.0"
     }
   ],
   "operatingsystem_support": [

spec/acceptance/puppetserver_upgrade_spec.rb

@@ -15,6 +15,9 @@
     end
 
     case ENV['BEAKER_PUPPET_COLLECTION']
+    when 'puppet8'
+      from_version = '8.2.0'
+      to_version = '8.3.0'
     when 'puppet7'
       from_version = '7.6.0'
       to_version = '7.13.0'