Fix deprecated datetime method

src/coscine/resource.py

@@ -19,7 +19,7 @@ from posixpath import join as join_paths
 import logging
 from textwrap import wrap
 from urllib.parse import urlparse, parse_qs
-from isodate import parse_datetime, parse_date
+from isodate import parse_date
 from requests_toolbelt import MultipartEncoder, MultipartEncoderMonitor
 from tabulate import tabulate
 from tqdm import tqdm
@@ -1047,7 +1047,7 @@ class FileObject:
             expires = parse_qs(urlparse(self.download_url).query)["Expires"][0]
         else:
             expires = "0"
-        return datetime.utcfromtimestamp(float(expires))
+        return datetime.fromtimestamp(float(expires))
 
     @property
     def client(self) -> ApiClient: