fix compatibility with Python 3.8 on Windows
fix compatibility with Python 3.8 on Windows

Kriechi/mitmproxy,mhils/mitmproxy,vhaupert/mitmproxy,mitmproxy/mitmproxy,vhaupert/mitmproxy,mhils/mitmproxy,Kriechi/mitmproxy,mhils/mitmproxy,Kriechi/mitmproxy,vhaupert/mitmproxy,vhaupert/mitmproxy,mitmproxy/mitmproxy,mitmproxy/mitmproxy,Kriechi/mitmproxy,mitmproxy/mitmproxy,mitmproxy/mitmproxy,mhils/mitmproxy,mhils/mitmproxy