Add missing package declaration in setup.py

Author: ttt733

alpaca_trade_api/__init__.py

@@ -1,4 +1,4 @@
 from .rest import REST  # noqa
 from .stream2 import StreamConn  # noqa
 
-__version__ = '0.43'
+__version__ = '0.44'

setup.py

@@ -23,7 +23,7 @@
     author_email='[email protected]',
     url='https://github.com/alpacahq/alpaca-trade-api-python',
     keywords='financial,timeseries,api,trade',
-    packages=['alpaca_trade_api', 'alpaca_trade_api.polygon'],
+    packages=['alpaca_trade_api', 'alpaca_trade_api.polygon', 'alpaca_trade_api.alpha_vantage'],
     install_requires=[
         'asyncio-nats-client',
         'pandas',