Pass all keyword arguments through to flask server (#20)

Author: kirby-jobber

slackeventsapi/__init__.py

@@ -10,5 +10,5 @@ def __init__(self, verification_token, endpoint="/slack/events"):
         self.verification_token = verification_token
         self.server = SlackServer(verification_token, endpoint, self)
 
-    def start(self, host='127.0.0.1', port=None, debug=False):
-        self.server.run(host=host, port=port, debug=debug)
+    def start(self, host='127.0.0.1', port=None, debug=False, **kwargs):
+        self.server.run(host=host, port=port, debug=debug, **kwargs)