Update requirements

requirements.txt

-alembic==0.9.9
-amqp==2.2.2
+alembic==1.3.1
+amqp==2.5.2
 appdirs==1.4.3
-APScheduler==3.5.1
+APScheduler==3.6.3
 argh==0.26.2
-bandit==1.4.0
-billiard==3.5.0.4
+bandit==1.6.2
+billiard==3.6.1.0
 blessings==1.7
 blinker==1.4
-bpython==0.17.1
-caldav==0.5.0
-celery==4.2.1
-certifi==2018.4.16
+bpython==0.18
+caldav==0.6.2
+celery==4.3.0
+certifi==2019.11.28
 chardet==3.0.4
-click==6.7
-colorama==0.3.9
-coverage==4.5.1
+Click==7.0
+colorama==0.4.3
+coverage==4.5.4
 curtsies==0.3.0
-dnspython==1.15.0
-enum-compat==0.0.2
-eventlet==0.24.1
-feedgen==0.7.0
-Flask==1.0.2
-Flask-Migrate==2.2.1
-Flask-SQLAlchemy==2.3.2
+dnspython==1.16.0
+enum-compat==0.0.3
+eventlet==0.25.1
+feedgen==0.8.0
+Flask==1.1.1
+Flask-Migrate==2.5.2
+Flask-SQLAlchemy==2.4.1
 Flask-WTF==0.14.2
-fuzzywuzzy==0.16.0
-gitdb2==2.0.3
-GitPython==2.1.9
-greenlet==0.4.14
-icalendar==4.0.2
-idna==2.7
-itsdangerous==0.24
-Jinja2==2.10
-kombu==4.2.1
-ldap3==2.5.1
-lxml==4.2.4
-Mako==1.0.7
+fuzzywuzzy==0.17.0
+gitdb2==2.0.6
+GitPython==3.0.5
+greenlet==0.4.15
+icalendar==4.0.4
+idna==2.8
+itsdangerous==1.1.0
+Jinja2==2.10.3
+kombu==4.6.7
+ldap3==2.6.1
+lxml==4.4.2
+Mako==1.1.0
 mando==0.6.4
-MarkupSafe==1.0
+MarkupSafe==1.1.1
 mccabe==0.6.1
 monotonic==1.5
 nose==1.3.7
-packaging==17.1
+packaging==19.2
 pathtools==0.1.2
-pbr==4.2.0
-psycopg2-binary==2.7.5
-pyasn1==0.4.4
-pyasn1-modules==0.2.2
-pycodestyle==2.4.0
-Pygments==2.2.0
+pbr==5.4.4
+psycopg2-binary==2.8.4
+pyasn1==0.4.8
+pyasn1-modules==0.2.7
+pycodestyle==2.5.0
+Pygments==2.5.2
 pyldap==3.0.0.post1
-pyparsing==2.2.0
-python-dateutil==2.7.3
-python-dotenv==0.9.1
-python-editor==1.0.3
-python-engineio==2.2.0
-python-ldap==3.1.0
+pyparsing==2.4.5
+python-dateutil==2.8.1
+python-dotenv==0.10.3
+python-editor==1.0.4
+python-engineio==3.11.0
+python-ldap==3.2.0
 python-Levenshtein==0.12.0
 python-pam==1.8.4
-pytz==2018.4
-PyYAML==3.13
-raven==6.9.0
-redis==2.10.6
-regex==2018.7.11
-requests==2.19.1
-six==1.11.0
-smmap2==2.0.3
-SQLAlchemy==1.2.7
-SQLAlchemy-Utils==0.33.3
-stevedore==1.29.0
-typing==3.6.4
-tzlocal==1.5.1
-urllib3==1.23
+pytz==2019.3
+PyYAML==5.2
+raven==6.10.0
+redis==3.3.11
+regex==2019.12.9
+requests==2.22.0
+six==1.13.0
+smmap2==2.0.5
+SQLAlchemy==1.3.11
+SQLAlchemy-Utils==0.36.0
+stevedore==1.31.0
+typing==3.7.4.1
+tzlocal==2.0.0
+urllib3==1.25.7
 uwsgidecorators==1.1.0
-vine==1.1.4
+vine==1.3.0
 vobject==0.9.6.1
-watchdog==0.8.3
+watchdog==0.9.0
 wcwidth==0.1.7
-Werkzeug==0.14.1
+Werkzeug==0.16.0
 WTForms==2.2.1