Handle socket.timeout exception that happens on Python 3.6

sarracenia/moth/amqpconsumer.py

@@ -26,6 +26,7 @@
 import sarracenia
 from sarracenia.moth.amqp import AMQP, amqp_ss_maxlen, default_options
 
+import socket
 import time
 import queue
 
@@ -103,6 +104,10 @@ def getNewMessage(self) -> sarracenia.Message:
                 self.connection.drain_events(timeout=0.1) # TODO configurable timeout?
             except TimeoutError:
                 pass
+            # In newer Python versions, socket.timeout is "a deprecated alias of TimeoutError", but it's not on
+            # older versions (3.6) and needs to be handled separately
+            except socket.timeout:
+                pass
 
             try:
                 # don't block waiting for the queue to be available, better to just try again later