Fix lint issues, updated pre-commit to catch flake8 issues

.pre-commit-config.yaml

@@ -26,3 +26,7 @@ repos:
     exclude: tests
     additional_dependencies:
     - types-paramiko
+- repo: https://github.com/pycqa/flake8
+  rev: 6.1.0
+  hooks:
+  - id: flake8

tap_postgres/client.py

@@ -5,8 +5,7 @@
 from __future__ import annotations
 
 import datetime
-from contextlib import contextmanager
-from typing import TYPE_CHECKING, Any, Dict, Iterable, Iterator, Optional, Type, Union
+from typing import TYPE_CHECKING, Any, Dict, Iterable, Optional, Type, Union
 
 import psycopg2
 import singer_sdk.helpers._typing
@@ -58,6 +57,10 @@ def __init__(
             sqlalchemy_url: Optional URL for the connection.
         """
 
+        # Dates in postgres don't all convert to python datetime objects, so we
+        # need to register a custom type caster to convert these to a string
+        # See https://www.psycopg.org/psycopg3/docs/advanced/adapt.html#example-handling-infinity-date # noqa: E501
+        # For more information
         if config is not None and config["dates_as_string"] is True:
             string_dates = psycopg2.extensions.new_type(
                 (1082, 1114, 1184), "STRING_DATES", psycopg2.STRING

tap_postgres/tap.py

@@ -6,7 +6,7 @@
 import signal
 from functools import cached_property
 from os import chmod, path
-from typing import Any, Dict, Mapping, cast
+from typing import Any, Dict, cast
 
 import paramiko
 from singer_sdk import SQLTap, Stream