rules_license 0.0.4 release

[Tony Aiuto]

I just did a roll-up PR of work we did internally over the last year or two and created a 0.0.4 release to facilitate trying it.

https://github.com/bazelbuild/rules_license/releases/tag/0.0.4

• Much more inclusive dependency gathering
• more useful JSON output from gather_licenses_info. That, of course, changes the format.]
• More examples/tests

On the horizon:

• Soon to drop: rename default_applicable_licenses to default_package_metadata.
• packge_info() rule to hold a bunch of SBOM related fields.