Suppress a warning caused by code from a polyfill.

Analyzers/Terminal.Gui.Analyzers.Internal/GlobalSuppressions.cs

@@ -0,0 +1,3 @@
+using System.Diagnostics.CodeAnalysis;
+
+[assembly: SuppressMessage ("Naming", "CA1708:Names should differ by more than case", Scope = "module", Justification = "That's coming from an external generator.")]