Don't inheric from 'object' (after deprecating Python 2.x support)

libagent/gpg/agent.py

@@ -70,7 +70,7 @@ class AgentStop(Exception):
 
 
 # pylint: disable=too-many-instance-attributes
-class Handler(object):
+class Handler:
     """GPG agent requests' handler."""
 
     def _get_options(self):

libagent/gpg/client.py

@@ -15,7 +15,7 @@ def create_identity(user_id, curve_name):
     return result
 
 
-class Client(object):
+class Client:
     """Sign messages and get public keys from a hardware device."""
 
     def __init__(self, device):

libagent/gpg/protocol.py

@@ -185,7 +185,7 @@ def get_curve_name_by_oid(oid):
     raise KeyError('Unknown OID: {!r}'.format(oid))
 
 
-class PublicKey(object):
+class PublicKey:
     """GPG representation for public key packets."""
 
     def __init__(self, curve_name, created, verifying_key, ecdh=False):

libagent/gpg/tests/test_keyring.py

@@ -41,7 +41,7 @@ def test_parse_rsa():
     assert keyring.parse_sig(sig) == (0x1020304,)
 
 
-class FakeSocket(object):
+class FakeSocket:
     def __init__(self):
         self.rx = io.BytesIO()
         self.tx = io.BytesIO()