Make the file search for app.config and web.config case insensitive w…

…hen writing binding redirects

src/Paket.Core/BindingRedirects.fs

@@ -57,7 +57,7 @@ let private applyBindingRedirects bindingRedirects (configFilePath:string) =
 /// Applies a set of binding redirects to all .config files in a specific folder.
 let applyBindingRedirectsToFolder rootPath bindingRedirects =
     Directory.GetFiles(rootPath, "*.config", SearchOption.AllDirectories) 
-    |> Seq.filter (fun x -> x.EndsWith(Path.DirectorySeparatorChar.ToString() + "web.config") || x.EndsWith(Path.DirectorySeparatorChar.ToString() + "app.config"))
+    |> Seq.filter (fun x -> x.EndsWith(Path.DirectorySeparatorChar.ToString() + "web.config", StringComparison.CurrentCultureIgnoreCase) || x.EndsWith(Path.DirectorySeparatorChar.ToString() + "app.config", StringComparison.CurrentCultureIgnoreCase))
     |> Seq.iter (applyBindingRedirects bindingRedirects)
 
 /// Calculates the short form of the public key token for use with binding redirects, if it exists.