Stop using deprecated interfaces

Use `Kaleidoscope.useEventHandlerHook` instead of `event_handler_hook_use`,
which is getting deprecated.

Signed-off-by: Gergely Nagy <kaleidoscope@gergo.csillger.hu>

src/Kaleidoscope-Macros.cpp

@@ -198,7 +198,7 @@ Macros_::Macros_(void) {
 
 void
 Macros_::begin(void) {
-  event_handler_hook_use(handleMacroEvent);
+  Kaleidoscope.useEventHandlerHook(handleMacroEvent);
 }
 
 Macros_ Macros;