Bump version to 13.0.0 in preparation for release.

Author: MrMatthewLayton

Directory.Build.props

@@ -2,9 +2,9 @@
 
     <!--GLOBAL-->
     <PropertyGroup>
-        <Version>12.2.0</Version>
-        <PackageVersion>12.2.0</PackageVersion>
-        <AssemblyVersion>12.2.0</AssemblyVersion>
+        <Version>13.0.0</Version>
+        <PackageVersion>13.0.0</PackageVersion>
+        <AssemblyVersion>13.0.0</AssemblyVersion>
         <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
         <LangVersion>14</LangVersion>
         <Nullable>enable</Nullable>