Add support for Debian 13

Author: kenyon

REFERENCE.md

@@ -138,7 +138,7 @@ Default value: `undef`
 
 ##### <a name="-apt--backports"></a>`backports`
 
-Data type: `Optional[Hash]`
+Data type: `Hash`
 
 Specifies some of the default parameters used by apt::backports. Valid options: a hash made up from the following keys:
 
@@ -148,7 +148,14 @@ Options:
 * **:repos** `String`: See apt::backports for documentation.
 * **:key** `String`: See apt::backports for documentation.
 
-Default value: `undef`
+Default value:
+
+```puppet
+{
+    'location' => 'http://deb.debian.org/debian',
+    'repos' => 'main contrib non-free non-free-firmware',
+  }
+```
 
 ##### <a name="-apt--confs"></a>`confs`
 

data/os/Debian.yaml

@@ -186,7 +186,10 @@
   Optional[String[1]] $key_options = undef,
   Optional[Array[String[1]]] $ppa_options = undef,
   Optional[String[1]] $ppa_package = undef,
-  Optional[Hash] $backports = undef,
+  Hash $backports = {
+    'location' => 'http://deb.debian.org/debian',
+    'repos' => 'main contrib non-free non-free-firmware',
+  },
   Hash $confs = {},
   Hash $update = {},
   Hash $purge = {},

data/os/Debian/12.yaml

@@ -18,7 +18,8 @@
       "operatingsystem": "Debian",
       "operatingsystemrelease": [
         "11",
-        "12"
+        "12",
+        "13"
       ]
     },
     {