* add: package url in model.Library
* feat(trivy-to-vuls): add purl for library scan result
* feat(scanner/library): add purl for lockfile scan result
* fix: model.Library test
* fix: trivy-to-vuls test data
* fix: panic case to generate purl
* fix: add blank line
* fix: trivy-to-vuls for using Trivy version 0.49.0 or earlier
* fix: remove comment
* fix: remove print
* fix: testcase for Package.Identifier does not exist version
* fix: add blank line
* fix: expected libs
* fix: PackageURL -> PURL
* fix: blank line
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