Update package dependencies

requirements.txt

-alembic==0.8.10
-amqp==2.1.4
-appdirs==1.4.0
-APScheduler==3.3.1
+alembic==0.9.8
+amqp==2.2.2
+appdirs==1.4.3
+APScheduler==3.5.1
 argh==0.26.2
-billiard==3.5.0.2
-blessings==1.6
+billiard==3.5.0.3
+blessings==1.6.1
 blinker==1.4
-bpython==0.16
+bpython==0.17.1
 caldav==0.5.0
-celery==4.0.2
+celery==4.1.0
+certifi==2018.1.18
+chardet==3.0.4
 click==6.7
-coverage==4.3.4
-curtsies==0.2.11
+coverage==4.5.1
+curtsies==0.3.0
 enum-compat==0.0.2
-eventlet==0.21.0
-Flask==0.12
-Flask-Migrate==2.0.3
-Flask-Script==2.0.5
-Flask-SocketIO==2.8.4
-Flask-SQLAlchemy==2.1
+eventlet==0.22.1
+Flask==0.12.2
+Flask-Migrate==2.1.1
+Flask-Script==2.0.6
+Flask-SocketIO==2.9.3
+Flask-SQLAlchemy==2.3.2
 Flask-WTF==0.14.2
-fuzzywuzzy==0.15.0
-greenlet==0.4.12
+fuzzywuzzy==0.16.0
+greenlet==0.4.13
+idna==2.6
 itsdangerous==0.24
-Jinja2==2.9.5
-kombu==4.0.2
-ldap3==2.2.2
-lxml==3.7.3
-Mako==1.0.6
-MarkupSafe==0.23
+Jinja2==2.10
+kombu==4.1.0
+ldap3==2.4.1
+lxml==4.1.1
+Mako==1.0.7
+MarkupSafe==1.0
 nose==1.3.7
 packaging==16.8
 pathtools==0.1.2
 psycopg2==2.7.4
-pyasn1==0.2.3
+pyasn1==0.4.2
 Pygments==2.2.0
-pyldap==2.4.28
-pyparsing==2.1.10
-python-dateutil==2.6.0
+pyldap==2.4.45
+pyparsing==2.2.0
+python-dateutil==2.6.1
 python-editor==1.0.3
-python-engineio==1.2.2
+python-engineio==2.0.2
 python-Levenshtein==0.12.0
 python-pam==1.8.2
-python-socketio==1.7.1
-pytz==2016.10
+python-socketio==1.8.4
+pytz==2018.3
 PyYAML==3.12
-redis==2.10.5
-regex==2017.2.8
-requests==2.13.0
-six==1.10.0
-SQLAlchemy==1.1.5
-tzlocal==1.3
+redis==2.10.6
+regex==2018.2.8
+requests==2.18.4
+six==1.11.0
+SQLAlchemy==1.2.3
+typing==3.6.4
+tzlocal==1.5.1
+urllib3==1.22
 uwsgidecorators==1.1.0
-vine==1.1.3
-vobject==0.9.4.1
+vine==1.1.4
+vobject==0.9.5
 watchdog==0.8.3
 wcwidth==0.1.7
-Werkzeug==0.11.15
+Werkzeug==0.14.1
 WTForms==2.1