Stop using USE_PLUGINS

The `USE_PLUGINS` macro is getting obsoleted, use `Kaleidoscope.use` instead.

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

README.md

@@ -29,12 +29,12 @@ and register the `Focus` hooks:
 #include <Kaleidoscope-Focus.h>
 
 void setup() {
-  USE_PLUGINS(&EEPROMSettings, &FingerPainter, &Focus);
+  Kaleidoscope.use(&EEPROMSettings, &FingerPainter, &Focus);
 
   Kaleidoscope.setup();
 
   EEPROMSettings.seal();
-  
+
   Focus.addHook(FOCUS_HOOK_FINGERPAINTER);
 }
 ```

examples/FingerPainter/FingerPainter.ino

@@ -44,7 +44,7 @@ const Key keymaps[][ROWS][COLS] PROGMEM = {
 };
 
 void setup() {
-  USE_PLUGINS(&LEDOff, &EEPROMSettings, &FingerPainter, &Focus);
+  Kaleidoscope.use(&LEDOff, &EEPROMSettings, &FingerPainter, &Focus);
 
   Kaleidoscope.setup();