Merge pull request #39 from FoamyGuy/pulseio_comment_update

update comment to refer to pwmio.PWMOut instead of pulseio

adafruit_pca9685.py

@@ -42,7 +42,7 @@
 
 
 class PWMChannel:
-    """A single PCA9685 channel that matches the :py:class:`~pulseio.PWMOut` API."""
+    """A single PCA9685 channel that matches the :py:class:`~pwmio.PWMOut` API."""
 
     def __init__(self, pca, index):
         self._pca = pca