stubsabot: fix legacy version parsing (#9866)

New `packaging` is strict and doesn't like paramiko's pokemon versioning
scheme from 2004

Fixes #9865

Author: hauntsaninja

scripts/stubsabot.py

@@ -82,6 +82,17 @@ class PypiReleaseDownload:
 ReleaseDownload: TypeAlias = dict[str, Any]
 
 
+def _best_effort_version(version: VersionString) -> packaging.version.Version:
+    try:
+        return packaging.version.Version(version)
+    except packaging.version.InvalidVersion:
+        # packaging.version.Version no longer parses legacy versions
+        try:
+            return packaging.version.Version(version.replace("-", "+"))
+        except packaging.version.InvalidVersion:
+            return packaging.version.Version("0")
+
+
 @dataclass
 class PypiInfo:
     distribution: str
@@ -104,7 +115,7 @@ def get_latest_release(self) -> PypiReleaseDownload:
         return self.get_release(version=self.info["version"])
 
     def releases_in_descending_order(self) -> Iterator[PypiReleaseDownload]:
-        for version in sorted(self.releases, key=packaging.version.Version, reverse=True):
+        for version in sorted(self.releases, key=_best_effort_version, reverse=True):
             yield self.get_release(version=version)