Stop using obsolete functions

`USE_PLUGINS` and `event_handler_hook_use` are being phased out, stop using them.

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

README.md

@@ -40,7 +40,7 @@ void cycleAction(Key previous_key, uint8_t cycle_count) {
 }
 
 void setup(void) {
-  USE_PLUGINS(&Cycle);
+  Kaleidoscope.use(&Cycle);
 
   Kaleidoscope.setup();
 }

examples/Cycle/Cycle.ino

@@ -52,7 +52,7 @@ void cycleAction(Key previous_key, uint8_t cycle_count) {
 }
 
 void setup() {
-  USE_PLUGINS(&Cycle);
+  Kaleidoscope.use(&Cycle);
 
   Kaleidoscope.setup();
 }

src/Kaleidoscope/Cycle.cpp

@@ -35,7 +35,7 @@ Cycle::Cycle(void) {
 }
 
 void Cycle::begin(void) {
-  event_handler_hook_use(eventHandlerHook);
+  Kaleidoscope.useEventHandlerHook(eventHandlerHook);
 }
 
 void Cycle::replace(Key key) {