chore(api): dependencies version bump

api/requirements.txt

@@ -1,10 +1,10 @@
-Django==1.10.*
+Django==1.11.*
 mysqlclient==1.3.*
-djangorestframework==3.5.*
-djoser==0.5.*
+djangorestframework==3.6.*
+djoser==0.6.*
 dnspython==1.15.*
 httpretty==0.8.*
-requests==2.7.*
+requests==2.18.*
 uwsgi==2.0.*
 django-nocaptcha-recaptcha==0.0.19  # updated manually
 sqlparse==0.2.*