Log Message:
py-djangocms-link: updated to 2.5.0

2.5.0:
Added file link support
Allow link requirement to be changed when another CMS plugin inherits from \ 
AbstractLink
Fixed a bug preventing HOSTNAME_PATTERN to work
Updated translations

2.4.0:
Added support for Django 2.2 and django CMS 3.7
Removed support for Django 2.0
Extended test matrix
Added isort and adapted imports
Adapted code base to align with other supported addons