Add/license url override

[pymenguy]

Hello,

When testing the capabilities of the tool, I noticed the URL could not be overridden by the option "override-package-information".

For many reasons URLs may be broken (domain name changing/expiring, changing SCM provider, etc). If we were to attempt the download of the original license, it would fail.

One such package I encountered is SharpDX, which still has the invalid URL linked on nuget.org :

• Invalid: http://sharpdx.org/License.txt
• Still active: https://github.com/sharpdx/SharpDX/blob/v4.2.0/License.txt

Following what was written in #53 and #68 I also added the LicenceUrl to the list of fields and to the tests.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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0.0% Duplication on New Code

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[sensslen]

Thank you very much for your contribution. Would you mind adding a test that verifies that the LicenseUrl ends up in the override package information?