Merge pull request #36 from pythonzm/dependabot/pip/twisted-19.7.0

Bump twisted from 17.5.0 to 19.7.0

Author: pythonzm

requirements.txt

@@ -78,7 +78,7 @@ six==1.10.0
 smmap2==2.0.5
 svn==0.3.46
 tablib==0.12.1
-Twisted==17.5.0
+Twisted==19.7.0
 txaio==2.10.0
 unicodecsv==0.14.1
 urllib3==1.23