`purl_to_lookups` doesn't give dictionary for qualifiers

[TG1999]

>>> purl = "pkg:alpine/openssl@0?arch=aarch64&distroversion=edge&reponame=main"
>>> purl_to_lookups(purl_str=purl)
{'type': 'alpine', 'name': 'openssl', 'version': '0', 'qualifiers': 'arch=aarch64&distroversion=edge&reponame=main'}