fix: Replace deprecated utcnow, utcfromtimestamp (#2286)

Co-authored-by: Anthonios Partheniou <[email protected]>

Author: salty-horse

googleapiclient/channel.py

@@ -78,7 +78,7 @@
 from googleapiclient import errors
 
 # The unix time epoch starts at midnight 1970.
-EPOCH = datetime.datetime.utcfromtimestamp(0)
+EPOCH = datetime.datetime(1970, 1, 1)
 
 # Map the names of the parameters in the JSON channel description to
 # the parameter names we use in the Channel class.

googleapiclient/discovery_cache/file_cache.py

@@ -46,7 +46,7 @@
 LOGGER = logging.getLogger(__name__)
 
 FILENAME = "google-api-python-client-discovery-doc.cache"
-EPOCH = datetime.datetime.utcfromtimestamp(0)
+EPOCH = datetime.datetime(1970, 1, 1)
 
 
 def _to_timestamp(date):

tests/test_discovery.py

@@ -2193,7 +2193,7 @@ def _dummy_token(self):
         client_id = "some_client_id"
         client_secret = "cOuDdkfjxxnv+"
         refresh_token = "1/0/a.df219fjls0"
-        token_expiry = datetime.datetime.utcnow()
+        token_expiry = datetime.datetime.now(datetime.timezone.utc)
         user_agent = "refresh_checker/1.0"
         return OAuth2Credentials(
             access_token,