Merge branch 'safety' into 'master'

Disable pipconflictchecker and include a check if the requirements are up to date into CI.

See merge request !790

dev-requirements.txt

@@ -6,3 +6,4 @@ pydenticon>=0.3.1
 pylint
 pylint-django
 tox
+safety

tox.ini

@@ -11,11 +11,13 @@ commands =
     cp {toxinidir}/requirements.txt {envbindir}/reqtemp.txt
     sed -i /Django>=.*/d {envbindir}/reqtemp.txt
     pip install -r{envbindir}/reqtemp.txt -r{toxinidir}/dev-requirements.txt
-    pipconflictchecker  # if this fails, use pipdeptree to debug
+    # Issue https://gitlab.science.ru.nl/thalia/concrexit/issues/631
+    #pipconflictchecker  # if this fails, use pipdeptree to debug
     python manage.py check
     python manage.py templatecheck --project-only
     python manage.py makemigrations --no-input --check --dry-run
     python -Wall -mcoverage run --branch --source '.' manage.py test
+    safety check
 deps = 
     coverage
     pip-conflict-checker