sort the sample eventwebhook payload keys

Makefile

@@ -1,6 +1,6 @@
 .PHONY: venv install test-install test test-integ test-docker clean nopyc
 
-venv:
+venv: clean
 	@python --version || (echo "Python is not installed, please install Python 2 or Python 3"; exit 1);
 	virtualenv --python=python venv
 

sendgrid/helpers/eventwebhook/__init__.py

@@ -1,12 +1,14 @@
 from ellipticcurve.ecdsa import Ecdsa
-from ellipticcurve.signature import Signature
 from ellipticcurve.publicKey import PublicKey
+from ellipticcurve.signature import Signature
 
-class EventWebhook():
+
+class EventWebhook:
     """
     This class allows you to use the Event Webhook feature. Read the docs for
     more details: https://sendgrid.com/docs/for-developers/tracking-events/event
     """
+
     def __init__(self, public_key=None):
         """
         Construct the Event Webhook verifier object

test/test_eventwebhook.py

@@ -3,6 +3,7 @@
 
 from sendgrid import EventWebhook
 
+
 class UnitTests(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
@@ -13,7 +14,7 @@ def setUpClass(cls):
             'event': 'test_event',
             'category': 'example_payload',
             'message_id': 'message_id',
-        }, separators=(',', ':'))
+        }, sort_keys=True, separators=(',', ':'))
 
     def test_verify_valid_signature(self):
         ew = EventWebhook()