Bump requirements

requirements.txt

@@ -1,11 +1,11 @@
-Django>=1.8,<1.9
-django-bootstrap-form==3.2
-django-cors-headers==1.1.0
-django-extensions==1.6.1
-django-phonenumber-field==1.0.0
-gunicorn==19.4.5
-mysqlclient==1.3.7
-pyldap==2.4.25.1
-raven==5.25.0
-requests==2.9.1
-django-auth-ldap==1.2.7
+django>=1.11,<1.12
+django-bootstrap-form==3.2.1
+django-cors-headers==2.1.0
+django-extensions==1.8.1
+django-phonenumber-field==1.3.0
+gunicorn==19.7.1
+mysqlclient==1.3.10
+pyldap==2.4.37
+raven==6.1.0
+requests==2.18.1
+django-auth-ldap==1.2.13