Bump twisted from 16.3.0 to 19.2.1 (#18)

dependabot[bot] · Oded Messer · commit ea490a7a44d9 · 2019-07-11T11:55:37.000+03:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,6 +1,6 @@
 inflection==0.3.1
 simplejson==3.8.2
-Twisted==16.3.0
+Twisted==19.2.1
 pytz==2016.7
 colorama==0.3.3
 pygments==2.2.0
