Add ConanVersionRange class and test

src/univers/version_range.py

@@ -377,6 +377,11 @@ def from_native(cls, string):
         return cls(constraints=constraints)
 
 
+class Conan1VersionRange(NpmVersionRange):
+    scheme = "conan1"
+    version_class = versions.SemverVersion
+
+
 class GemVersionRange(VersionRange):
     """
     A version range implementation for Rubygems.
@@ -1100,6 +1105,11 @@ class MattermostVersionRange(VersionRange):
 def from_gitlab_native(gitlab_scheme, string):
     purl_scheme = PURL_TYPE_BY_GITLAB_SCHEME[gitlab_scheme]
     vrc = RANGE_CLASS_BY_SCHEMES[purl_scheme]
+    supported_native_implementations = [
+        Conan1VersionRange,
+    ]
+    if vrc in supported_native_implementations:
+        return vrc.from_native(string)
     constraint_items = []
     constraints = []
     split = " "
@@ -1223,6 +1233,7 @@ def build_range_from_github_advisory_constraint(scheme: str, string: str):
     "nginx": NginxVersionRange,
     "openssl": OpensslVersionRange,
     "mattermost": MattermostVersionRange,
+    "conan1": Conan1VersionRange,
 }
 
 PURL_TYPE_BY_GITLAB_SCHEME = {
@@ -1233,4 +1244,5 @@ def build_range_from_github_advisory_constraint(scheme: str, string: str):
     "nuget": "nuget",
     "pypi": "pypi",
     "packagist": "composer",
+    "conan": "conan1",
 }