Bump version number to 2.3

NatTypeTester/NatTypeTester.csproj

@@ -6,7 +6,7 @@
     <UseWPF>true</UseWPF>
     <ApplicationIcon>icon.ico</ApplicationIcon>
     <LangVersion>8</LangVersion>
-    <Version>2.2</Version>
+    <Version>2.3</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">