another fix on pip deps

requirements.txt

 arrow==0.4.2
+certifi==2018.8.24
+chardet==3.0.4
 click==6.7
 eventlet==0.22.1
 Flask==0.12.2
 Flask-SocketIO==2.9.4
 greenlet==0.4.13
 ics==0.3.1
+idna==2.7
 inflect==0.2.5
 irc==16.2
 itsdangerous==0.24
@@ -18,10 +21,13 @@ jaraco.text==1.9.2
 Jinja2==2.10
 MarkupSafe==1.0
 more-itertools==4.1.0
+pkg-resources==0.0.0
 pystache==0.5.4
 python-dateutil==2.6.1
 python-engineio==2.0.2
 python-socketio==1.8.4
 pytz==2018.3
+requests==2.19.1
 tempora==1.10
+urllib3==1.23
 Werkzeug==0.14.1