Support for utc in Py<3.11

Author: facundobatista

fades/envbuilder.py

@@ -21,7 +21,7 @@
 import pathlib
 import shutil
 
-from datetime import datetime, UTC
+from datetime import datetime, timezone
 from venv import EnvBuilder
 from uuid import uuid4
 
@@ -32,6 +32,9 @@
 
 logger = logging.getLogger(__name__)
 
+# UTC can be imported directly from datetime from Python 3.11
+UTC = timezone.utc
+
 
 class _FadesEnvBuilder(EnvBuilder):
     """Create always a virtual environment.