allow puppetlabs/apt 6.x

Author: bastelfreak

metadata.json

@@ -33,7 +33,7 @@
   "dependencies": [
     {
       "name": "puppetlabs/apt",
-      "version_requirement": ">= 2.1.0 < 6.0.0"
+      "version_requirement": ">= 2.1.0 < 7.0.0"
     },
     {
       "name": "puppetlabs/stdlib",