Revert "Upgrade master to develop in setup.py" (#650)

This reverts commit 06f6f56.

Author: webknjaz

setup.cfg

@@ -2,7 +2,7 @@
 name = proxy.py
 version = attr: proxy.common.version.__version__
 url = https://github.com/abhinavsingh/proxy.py
-download_url = https://github.com/abhinavsingh/proxy.py/archive/develop.zip
+download_url = https://github.com/abhinavsingh/proxy.py/archive/master.zip
 description =
   ⚡⚡⚡Fast, Lightweight, Pluggable, TLS interception capable proxy
   server focused on Network monitoring, controls & Application development,