Warn against Microsoft <windows.h> min and max macro (#1084)

Warn users they have defined the min/max macros which is not 
compatible with other code from the standard library or FTXUI.

Co-authored-by: Sylko Olzscher <sylko.olzscher@solostec.ch>
Co-authored-by: ArthurSonzogni <sonzogniarthur@gmail.com>

src/ftxui/component/task_runner.cpp

@@ -20,7 +20,6 @@ TaskRunner::~TaskRunner() {
   current_task_runner = previous_task_runner_;
 }
 
-
 // static
 auto TaskRunner::Current() -> TaskRunner* {
   assert(current_task_runner);
@@ -73,5 +72,4 @@ auto TaskRunner::Run() -> void {
   }
 }
 
-} // namespace ftxui::task
-
+}  // namespace ftxui::task