fix SNYK ecosystem mapping

- snyk refers `gem` as `rubygems`

Signed-off-by: Keshav Priyadarshi <git@keshav.space>

Author: keshav-space

vulntotal/datasources/snyk.py

@@ -60,7 +60,7 @@ def supported_ecosystem(cls):
             "npm": "npm",
             "nuget": "nuget",
             "pypi": "pip",
-            "rubygems": "rubygems",
+            "gem": "rubygems",
             # any purl.type not in supported_ecosystem shall implicitly be treated as unmanaged type
             "unmanaged": "unmanaged",
         }

vulntotal/tests/test_snyk.py

@@ -30,7 +30,7 @@ def test_generate_package_advisory_url(self):
             "pkg:nuget/moment.js@2.18.0",
             "pkg:cocoapods/ffmpeg@0.2",
             "pkg:hex/coherence@0.2.1",
-            "pkg:rubygems/log4j-jars@0.2",
+            "pkg:gem/log4j-jars@0.2",
             "pkg:unmanaged/firefox@8.9.1",
         ]
         results = [