fix: support legacy tox and setuptools for Python 3.6

setup.py

@@ -1,15 +1,14 @@
 # -*- coding: utf-8 -*-
 import os
 
-from setuptools import setup
+from setuptools import find_packages, setup
 
 VERSION = "0.61"
 
 setup(
     name="django_components",
-    package_dir={
-        "django_components": "src/django_components"
-    },
+    packages=find_packages(where="src", exclude=["tests", "tests.*"]),
+    package_dir={"": "src"},
     package_data={
         "django_components":  ["py.typed"],
     },

tox.ini

@@ -29,6 +29,8 @@ python =
   3.12: py312-django{42,50}, flake8, isort, coverage, mypy
 fail_on_no_env = True
 
+isolated_build = true
+
 [testenv]
 package = wheel
 wheel_build_env = .pkg