Upgrade to Terminal.gui 0.81.0 (#84)

* Fixed #58: Multi-line commands rendering wrong

* Fixed #58 - Newlines in commands render incorrectly

* Added debug instructions to readme

* Update src/Microsoft.PowerShell.ConsoleGuiTools/ConsoleGui.cs

Co-Authored-By: Tyler James Leonhardt <tylerl0706@gmail.com>

* simplified stripping of newline/linefeed

* Upgrading to Terminal.gui 0.81.0 and its depencency on Nstack 0.14.0

Co-authored-by: Tyler James Leonhardt <tylerl0706@gmail.com>

src/Microsoft.PowerShell.ConsoleGuiTools/Microsoft.PowerShell.ConsoleGuiTools.csproj

@@ -5,8 +5,8 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Nstack.Core" Version="0.12.0" />
-        <PackageReference Include="Terminal.Gui" Version="0.70.0" />
+        <PackageReference Include="Nstack.Core" Version="0.14.0" />
+        <PackageReference Include="Terminal.Gui" Version="0.81.0" />
         <PackageReference Include="Microsoft.PowerShell.SDK" Version="6.2.1" />
     </ItemGroup>