update version to 0.50.1

Shlomi Kushchi · web-flow · commit e5d3c0d9b6fd · 2020-08-24T23:24:02.000+03:00
diff --git a/alpaca_trade_api/__init__.py b/alpaca_trade_api/__init__.py
@@ -1,4 +1,4 @@
 from .rest import REST  # noqa
 from .stream2 import StreamConn  # noqa
 
-__version__ = '0.50.0'
+__version__ = '0.50.1'
