Updates: psycopg2, celery, csp

requirements.txt

@@ -3,7 +3,7 @@ argon2-cffi==16.3.0		# Password hashing algorithm
 Babel==2.4
 Django==2.2.11			# 2020-03-07
 feedparser==5.2.1		# Check: not updated since 2016
-psycopg2==2.7.3.2  		# PostgreSQL engine
+psycopg2==2.8.6	  		# 2020-09-19 PostgreSQL engine
 pytz==2017.2			# Timezone package
 djangorestframework==3.8.2
 requests==2.18.3
@@ -73,13 +73,13 @@ snowballstemmer==1.2.1
 
 
 # Scheduled tasks
-celery==4.3.0			# 2019-05-11, py3.4 to 3.7, req: amqp-2.4.2 billiard-3.6.0.0 kombu-4.5.0 vine-1.3.0
-django-celery-results==1.0.4	# 2019-05-11
-django-celery-beat==1.3.0	# 2019-05-11, req: celery, django-timezone-field-3.0 python-crontab-2.3.6
-flower==0.9.3 			# 2019-05-11, req: pytz, tornado, babel, celery
+celery==4.4.7			# 2020-09-19
+django-celery-results==1.2.1	# 2020-09-19
+django-celery-beat==2.0.0	# 2020-09-19
+flower==0.9.5 			# 2020-09-19
 
 
 # Security-related packages
-django-referrer-policy==1.0	# 2019-05-11, py<=3.6, Dj<=2.0, req:
-django-csp==3.5			# 2019-05-11
-django-feature-policy==2.2.0	# 2019-05-18
+django-referrer-policy==1.0	# 2020-09-19 no new updates for 3 years
+django-csp==3.7			# 2020-09-19
+django-feature-policy==3.4.0	# 2020-09-19