Replaced setup.cfg with pyproject.toml for the package settings, and rewrote the packaging rules in MANIFEST.in.

pyproject.toml

@@ -1,7 +1,7 @@
 # The Flask HTTP Digest Authentication Project.
 # Author: imacat@mail.imacat.idv.tw (imacat), 2022/11/23
 
-#  Copyright (c) 2022 imacat.
+#  Copyright (c) 2022-2023 imacat.
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -15,6 +15,39 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
+[project]
+name = "Flask-DigestAuth"
+version = "0.5.0"
+description = "The Flask HTTP Digest Authentication project."
+readme = "README.rst"
+requires-python = ">=3.7"
+authors = [
+    {name = "imacat", email = "imacat@mail.imacat.idv.tw"},
+]
+keywords = ["flask", "digest-authentication"]
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: Apache Software License",
+    "Operating System :: OS Independent",
+    "Framework :: Flask",
+    "Topic :: System :: Systems Administration :: Authentication/Directory",
+    "Intended Audience :: Developers",
+]
+dependencies = [
+    "flask",
+]
+
+[project.optional-dependencies]
+test = [
+    "unittest",
+    "flask-testing",
+]
+
+[project.urls]
+"Documentation" = "https://flask-digestauth.readthedocs.io"
+"Repository" = "https://github.com/imacat/flask-digestauth"
+"Bug Tracker" = "https://github.com/imacat/flask-digestauth/issues"
+
 [build-system]
 requires = ["setuptools>=42"]
 build-backend = "setuptools.build_meta"