Remove psycopg2 from dependencies (#117)

* remove psycopg2 from direct dependencies, only add it in tests

* bump to 1.0.1

* fix mypy

dev-requirements.txt

@@ -1,5 +1,6 @@
 black
 pytest-mypy-plugins==1.0.3
+psycopg2
 flake8
 isort==4.3.4
 -e .

mypy_django_plugin/django/context.py

@@ -3,7 +3,6 @@ from collections import defaultdict
 from contextlib import contextmanager
 from typing import TYPE_CHECKING, Dict, Iterator, List, Optional, Tuple, Type
 
-from django.contrib.postgres.fields import ArrayField
 from django.core.exceptions import FieldError
 from django.db.models.base import Model
 from django.db.models.fields import AutoField, CharField, Field
@@ -18,6 +17,12 @@ from mypy.types import TypeOfAny
 
 from mypy_django_plugin.lib import helpers
 
+try:
+    from django.contrib.postgres.fields import ArrayField
+except ImportError:
+    class ArrayField:  # type: ignore
+        pass
+
 if TYPE_CHECKING:
     from django.apps.registry import Apps  # noqa: F401
     from django.conf import LazySettings  # noqa: F401

setup.py

@@ -24,13 +24,11 @@ dependencies = [
     'mypy>=0.720,<0.730',
     'typing-extensions',
     'django',
-    # depends on psycopg2 because of Postgres' ArrayField support
-    'psycopg2'
 ]
 
 setup(
     name="django-stubs",
-    version="1.0.0",
+    version="1.0.1",
     description='Mypy stubs for Django',
     long_description=readme,
     long_description_content_type='text/markdown',