Change supported python versions to 3.8-3.12

.github/workflows/python-package.yml

@@ -12,10 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest"]
-        python_version: ["3.7", "3.8", "3.9", "3.10", "3.11", "pypy3.10"]
-        include:
-          - os: "ubuntu-20.04"
-            python_version: "3.6"
+        python_version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.10"]
 
     runs-on: ${{ matrix.os }}
     steps:

README.md

@@ -54,13 +54,8 @@ This package [is hosted on PyPI](https://pypi.org/project/marshmallow-dataclass/
 pip3 install marshmallow-dataclass
 ```
 
-You may optionally install the following extras:
-
-- `enum` : enum support for marshmallow versions <3.18 [marshmallow-enum](https://github.com/justanr/marshmallow_enum).
-- `union` : for translating python [`Union` types](https://docs.python.org/3/library/typing.html#typing.Union) to union fields.
-
 ```shell
-pip3 install "marshmallow-dataclass[enum,union]"
+pip3 install "marshmallow-dataclass"
 ```
 
 ### marshmallow 2 support

setup.py

@@ -1,30 +1,23 @@
 from setuptools import setup, find_packages
 
-VERSION = "8.6.1"
+VERSION = "9.0.0"
 
 CLASSIFIERS = [
     "Development Status :: 4 - Beta",
     "Environment :: Console",
     "Operating System :: OS Independent",
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.6",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Topic :: Internet :: WWW/HTTP :: Dynamic Content :: CGI Tools/Libraries",
 ]
 
 EXTRAS_REQUIRE = {
-    "enum": [
-        "marshmallow-enum; python_version < '3.7'",
-        "marshmallow>=3.18.0,<4.0; python_version >= '3.7'",
-    ],
-    "union": ["typeguard>=2.4.1,<5.0.0"],
     "lint": ["pre-commit~=2.17"],
-    ':python_version == "3.6"': ["dataclasses", "types-dataclasses<0.6.4"],
     "docs": ["sphinx"],
     "tests": [
         "pytest>=5.4",
@@ -34,11 +27,7 @@
     ],
 }
 EXTRAS_REQUIRE["dev"] = (
-    EXTRAS_REQUIRE["enum"]
-    + EXTRAS_REQUIRE["union"]
-    + EXTRAS_REQUIRE["lint"]
-    + EXTRAS_REQUIRE["docs"]
-    + EXTRAS_REQUIRE["tests"]
+    EXTRAS_REQUIRE["lint"] + EXTRAS_REQUIRE["docs"] + EXTRAS_REQUIRE["tests"]
 )
 
 setup(
@@ -56,15 +45,13 @@
     keywords=["marshmallow", "dataclass", "serialization"],
     classifiers=CLASSIFIERS,
     license="MIT",
-    python_requires=">=3.6",
+    python_requires=">=3.8",
     install_requires=[
-        "marshmallow>=3.13.0,<4.0",
-        "typing-inspect>=0.8.0,<1.0",
-        # Need `Literal`
-        "typing-extensions>=3.7.2; python_version < '3.8'",
+        "marshmallow>=3.18.0,",
+        "typing-inspect~=0.9.0",
+        "typeguard~=4.0.0",
         # Need `dataclass_transform(field_specifiers)`
-        # NB: typing-extensions>=4.2.0 conflicts with python 3.6
-        "typing-extensions>=4.2.0; python_version<'3.11' and python_version>='3.7'",
+        "typing-extensions>=4.2.0; python_version<'3.11'",
     ],
     extras_require=EXTRAS_REQUIRE,
     package_data={"marshmallow_dataclass": ["py.typed"]},

tests/test_union.py

@@ -197,10 +197,6 @@ class PEP604IntOrStr:
         data_in = {"value": 42}
         self.assertEqual(schema.dump(schema.load(data_in)), data_in)
 
-    @unittest.skipIf(
-        sys.version_info < (3, 7, 4),
-        "Requires  typeguard >=4.0.0 not available for py<3.7.4",
-    )
     def test_union_with_generics(self):
         IntList = NewType("IntList", List[int])