Fixes #1693 (Charmap wide runes) by upgrading to Nstack.core 0.17 (#1718)

* Fixes #1693 (Charmap wide runes) by upgrading to Nstack.core 0.17

* Upgraded Example to NStack.Core 0.17

Author: tig

Example/Example.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="NStack.Core" Version="0.16.0" />
+    <PackageReference Include="NStack.Core" Version="0.17.0" />
   </ItemGroup>
 
   <ItemGroup>

Terminal.Gui/Terminal.Gui.csproj

@@ -15,7 +15,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.2" PrivateAssets="all" />
-    <PackageReference Include="NStack.Core" Version="0.*" />
+    <PackageReference Include="NStack.Core" Version="0.17.0" />
     <PackageReference Include="MinVer" Version="4.0.0" PrivateAssets="all" />
     <InternalsVisibleTo Include="UnitTests" />
     <!-- <None Remove="ConsoleDrivers\#ConsoleDriver.cs#" /> -->