fix for 6.x - montonic_ns returns NotImplementedError

Author: rhooper

adafruit_led_animation/__init__.py

@@ -34,7 +34,9 @@ def const(value):  # pylint: disable=missing-docstring
 
 
 try:
-    from time import monotonic_ms
+    from time import monotonic_ns
+
+    monotonic_ns()  # Test monotonic_ns in 6.x
 
     def monotonic_ms():
         """
@@ -43,7 +45,7 @@ def monotonic_ms():
         return monotonic_ns() // NANOS_PER_MS
 
 
-except ImportError:
+except (ImportError, NotImplementedError):
     import time
 
     def monotonic_ms():