also find *.license files as evidence

[jkowalleck]

Is your feature request related to a problem? Please describe.

via #676 , collection license text evidence was introduced.
this feature foes not detect files like mit.LICENSE, as they are used in some packages.

Describe the solution you'd like

also detect files with pattern *.LICEN[SC]E as license evidence

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

Add any other context or screenshots about the feature request here.