Ruby Gem ICalendar license not recognized #12

It uses a different file name that is not included inside the crawler: COPYING

I suggested to rename the file to current github standards but no respnse so far.
icalendar/icalendar#170

Maybe the crawler should also look for COPYING file names.

The Github search also points out a lot more file names that could be helpful.
https://github.com/search?utf8=%E2%9C%93&q=COPYING+in%3Apath&type=Code&ref=searchresults

• All extensions for the current filenames not ony .txt, .md, but also .gpl, ...
• Sometimes the License is inside gpl.txt, gpl.md, apache.txt, ... {license name}.ending
• also often inside sub folders copying

What would be interesting here is how many of the crawled repositories are missing a license at the moment?