#30 add COPYING to license file names

Description

Added "(\\w*/)*COPYING" to recognise older license file names such as in https://github.com/ebreitmo/bolt.

Related issue: #30

Motivation and context

Repositories that have a license file called COPYING are now recognised to have a license file. These files were used especially for GPL. This behaviour is consistent e.g. with GitHub's own license recognition capabilities.

How has this been tested?

Ran against ebreitmo/bolt and softwaresaved/fuji repositories, which produced the expected results. Automated tests will run after creating the PR.

Types of changes

[x] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to change)
[ ] Code style update (formatting, renaming)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] Documentation content changes
[ ] Other (please describe):

Checklist

[x] I have read the contributor guide.
[x] My code follows the code style of this project.
[ ] My change requires a change to the documentation.
[ ] I have updated the documentation accordingly.
[ ] I have added tests to cover my changes.
[x] All new and existing tests passed.

Package	Line Rate	Branch Rate	Health
.	61%	35%	➖
config	100%	100%	✔
controllers	86%	56%	✔
evaluators	48%	27%	❌
harvester	58%	48%	➖
helper	65%	55%	➖
models	75%	85%	✔
Summary	63% (7720 / 12173)	55% (3306 / 6024)	➖

softwaresaved / fuji