Add audioio import for 4.x

Author: kattni

adafruit_circuitplayground/circuit_playground_base.py

@@ -39,7 +39,10 @@
 import math
 import array
 import time
-import audiocore
+try:
+    import audiocore
+except ImportError:
+    import audioio as audiocore
 import adafruit_lis3dh
 import adafruit_thermistor
 import analogio