docs fixes

CHANGELOG.md

@@ -16,6 +16,7 @@ v2.0.0
   * renamed publish(tx) to publish(confirm)
   * declare will expect qos to be given as an integer, and will be set as prefetch_count, since RabbitMQ no longer
     supports prefetch_size
+    * same can be said of Consumer.set_qos(prefetch_count)
 
 v1.5.0
 ======

coolamqp/attaches/consumer.py

@@ -84,10 +84,7 @@ class Consumer(Channeler):
     :param span: optional span, if opentracing is installed
     :param no_ack: Will this consumer require acknowledges from messages?
     :type no_ack: bool
-    :param qos: a tuple of (prefetch size, prefetch window) for this
-        consumer, or an int (prefetch window only).
-        If an int is passed, prefetch size will be set to 0 (which means
-        undefined), and this int will be used for prefetch window
+    :param qos: maximum messages to send to client that can stay unacknowledged (qos.prefetch_count)
     :type qos: int, prefetch_count to use
     :param cancel_on_failure: Consumer will cancel itself when link goes
         down