Updated dependencies (moderate security issue in Jinja2).
fix: News object has no attribute published_at.
chg: [templates] added link to the ATOM feeds and added anchor type for atom feeds in project.html template.
replaced cve.circl.lu by cvepremium.circl.lu
new: added configuration for the instance of CVE Search to be used.
fix: bad iteration on the loop of cve vendors.
fetch_cve worker is now using cvepremium.