Reconsider license name patterns

[AugustusKling]

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

Not sure if current patterns for license files match all files they should match. Same for lookup table of MIME types.

Describe the solution you'd like

Try out different patterns and check if additional, valid license files are found in commonly used NPM packages. Then decide if the current pattern in #LICENSE_FILENAME_PATTERN and MAP_TEXT_EXTENSION_MIME are good as they are or need to be changed.

[jkowalleck]

At the moment, there are no reports of files missing or not being detected as expected.
This ticket is there, to collect all traces and ideas for missing files.

📣 Everybody, feel free to add doubts, so we can add additional test cases and release possible fixes.