Add api_key argument as in Mixpanel package v4.3.2

The Mixpanel `BufferedConsumer.send` method now has a third argument
`api_key`, that `AsyncBufferedConsumer` has to have too.

CHANGELOG.md

@@ -7,6 +7,11 @@ project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+### Added
+
+* Argument `api_key` for `AsyncBufferedConsumer.send`, for compatibility with the version
+  4.3.2 of the Mixpanel package.
+
 ### Changed
 
 * Breaking change: Argument of `flush` renamed from `async` to `async_` for

mixpanel_async/async_buffered_consumer.py

@@ -133,7 +133,7 @@ def _should_flush(self, endpoint=None):
         return False
 
 
-    def send(self, endpoint, json_message):
+    def send(self, endpoint, json_message, api_key=None):
         '''
         Record an event or a profile update. Calls to send() will store
         the given message in memory, and (when enough messages have been stored)
@@ -147,6 +147,8 @@ def send(self, endpoint, json_message):
         :type endpoint: str (one of 'events' or 'people')
         :param json_message: A json message formatted for the endpoint.
         :type json_message: str
+        :param api_key: Your Mixpanel project's API key
+        :type api_key: str
         :raises: MixpanelException
         '''
         if endpoint not in self._async_buffers:
@@ -155,6 +157,9 @@ def send(self, endpoint, json_message):
         buf = self._async_buffers[endpoint]
         buf.append(json_message)
 
+        if api_key is not None:
+            self._api_key = api_key
+
         should_flush = self._should_flush(endpoint)
 
         if should_flush == self.ALL:

tests/async_buffered_consumer_test.py

@@ -148,7 +148,7 @@ def test_does_not_drop_events(self):
 
         self.wait_for_threads()
 
-        send_patch.assert_called_once_with(self.ENDPOINT, '[{"test": true}]')
+        send_patch.assert_called_once_with(self.ENDPOINT, '[{"test": true}]', None)
         self.assertEqual(self.consumer._async_buffers[self.ENDPOINT], [self.JSON])
 
     def test_raises_exception_with_bad_endpoint(self):