refresh dependencies in requirements file

requirements.txt

@@ -6,7 +6,9 @@ billiard==3.5.0.2
 cairocffi==0.8.1
 CairoSVG==2.1.3
 celery==4.0.0
+certifi==2018.4.16
 cffi==1.10.0
+chardet==3.0.4
 cssselect==1.0.3
 cssselect2==0.2.1
 defusedxml==0.5.0
@@ -21,6 +23,7 @@ django-crispy-forms==1.7.2
 django-debug-toolbar==1.9.1
 django-email-blacklist==1.0.1
 django-environ==0.4.5
+django-feedparser==0.2.1
 django-import-export==1.0.1
 django-jet==1.0.7
 django-js-asset==1.1.0
@@ -30,8 +33,12 @@ django-ranged-response==0.2.0
 django-registration-redux==2.4
 django-simple-captcha==0.5.9
 et-xmlfile==1.0.1
+eventlet==0.23.0
+feedparser==5.2.1
+greenlet==0.4.14
 gunicorn==19.7.1
 html5lib==1.0.1
+idna==2.7
 jdcal==1.4
 kombu==4.0.2
 lxml==4.2.3
@@ -46,6 +53,7 @@ Pyphen==0.9.4
 pytils==0.3
 pytz==2018.5
 PyYAML==3.13
+requests==2.19.1
 six==1.11.0
 sqlparse==0.2.4
 tablib==0.12.1