fixup: typing issues

capycli/bom/findsources.py

@@ -12,7 +12,7 @@
 import sys
 import time
 from collections.abc import Iterable
-from typing import Any, Dict, List, Tuple
+from typing import Any, Dict, List, Tuple, Set
 from urllib.parse import urlparse, parse_qs
 
 import requests
@@ -54,9 +54,9 @@ class TagCache:
            existing tag many times.
         """
         def __init__(self) -> None:
-            self.data: Dict[Tuple[str, str], set[str]] = {}
+            self.data: Dict[Tuple[str, str], Set[str]] = {}
 
-        def __getitem__(self, key: Any) -> set[str]:
+        def __getitem__(self, key: Any) -> Set[str]:
             """Get the set of all cached tags for a key."""
             return self.data[self._validate_key(key)]
 
@@ -364,7 +364,8 @@ def get_matching_source_url(self, version: Any, github_ref: str,
                 # 'name' is a viable index, for instance an error message
                 tags = {}
 
-            source_url = self.get_matching_tag(tags.values(), version, url)
+            source_url = self.get_matching_tag(
+                list(tags.values()), version, url)
             if len(source_url) > 0:  # we found what we believe is
                 return source_url    # the correct source_url
             for name in tags: