Merge pull request #27 from prcutler/root-group-fix

Update to use root_group for CP 9 compatibility

Author: dhalbert

examples/touchscreen_calibrator_built_in.py

@@ -63,7 +63,7 @@ class Colors:
 # Activate the display graphics unless REPL_ONLY=True
 if not REPL_ONLY:
     display_group = displayio.Group()
-    display.show(display_group)
+    display.root_group = display_group
 
 # Instantiate touch screen without calibration or display size parameters
 if display.rotation == 0: