Use Optional to support Python 3.9 #1904

Signed-off-by: Michael Ehab Mikhail <michael.ehab@hotmail.com>

Author: michaelehab

vulnerabilities/tests/pipelines/v2_importers/test_curl_live_importer_v2.py

@@ -13,8 +13,9 @@
 
 import pytest
 from packageurl import PackageURL
+from univers.version_range import GenericVersionRange
+from univers.version_range import VersionConstraint
 from univers.versions import SemverVersion
-from univers.version_range import GenericVersionRange, VersionConstraint
 
 from vulnerabilities.importer import AffectedPackageV2
 from vulnerabilities.pipelines.v2_importers.curl_live_importer import CurlLiveImporterPipeline