Allow puppet/systemd 9.x (#1235)

Author: evgeni

metadata.json

@@ -14,7 +14,7 @@
   "dependencies": [
     {
       "name": "puppet/systemd",
-      "version_requirement": ">= 3.1.0 < 9.0.0"
+      "version_requirement": ">= 3.1.0 < 10.0.0"
     },
     {
       "name": "puppetlabs/apache",