Don't escape colons in qualifier values

[melotic]

When adding a URL as a qualifier value, I was noticing that the URL's colons would be escaped. They should not be escaped.

[am11]

Looks good. BTW, python implementation (https://github.com/package-url/packageurl-python) is most up-to-date and it also fails this test: valid go purl with slash in name, namespace, version and qualifier

self = <test_packageurl.PurlTest testMethod=test_purl_pkg_valid_go_purl_with_slash_in_name_namespace_version_and_qualifier>

    def test_purl(self):
        # parsing the test canonical `purl` then re-building a `purl` from these
        # parsed components should return the test canonical `purl`
        cano = PackageURL.from_string(purl)
>       assert canonical_purl == cano.to_string()
E       AssertionError: assert 'pkg:golang/g...source.com/go' == 'pkg:golang/g...source.com/go'
E         - pkg:golang/google.golang.org/repo/gen/proto@abc/dedf?repository_url=go.googlesource.com/go
E         ?                                      ^         ^
E         + pkg:golang/google.golang.org/repo/gen%2Fproto@abc%2Fdedf?repository_url=go.googlesource.com/go
E         ?                                      ^^^         ^^^

tests/test_packageurl.py:82: AssertionError

Do you want to take a crack it?

Testing both ways (placing packageurl-dotnet test file in python repo and vice-versa) would be good for conformance purposes. (note to self: we can set it up in the CI to keep the implementations synchronized)

[melotic]

@am11 I've raised a PR here to sync and fix the tests: package-url/packageurl-python#123

[melotic]

Hi @am11, any updates?

[JamieMagee]

@ThomasPiskol is it possible to review this please?