Updated python-twisted packages fix security vulnerabilities:
Improper sanitization of URIs or HTTP which could allow attackers to perform CRLF attacks (CVE-2019-12387).
In words.protocols.jabber.xmlstream in Twisted through 19.2.1, XMPP support did not verify certificates when used with TLS, allowing an attacker to MITM connections (CVE-2019-12855).