Use pyproject.toml instead of setup.py (#48)

pyproject.toml

@@ -1,3 +1,59 @@
+[build-system]
+build-backend = "setuptools.build_meta"
+requires = [
+  "setuptools>=61.2",
+]
+
+[project]
+name = "DBUtils"
+version = "3.1.0b1"
+description = "Database connections for multi-threaded environments."
+license = {text = "MIT License"}
+authors = [{name = "Christoph Zwerschke", email = "cito@online.de"}]
+requires-python = ">3.7"
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+  "Environment :: Web Environment",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: MIT License",
+  "Operating System :: OS Independent",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "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",
+  "Topic :: Database",
+  "Topic :: Internet :: WWW/HTTP :: Dynamic Content",
+  "Topic :: Software Development :: Libraries :: Python Modules",
+]
+[project.optional-dependencies]
+pg = [
+  "PyGreSQL>=5",
+]
+testing = [
+  "pytest>=7",
+  "ruff",
+]
+
+[project.readme]
+file = "README.md"
+content-type = "text/markdown"
+
+[project.urls]
+Homepage = "https://webwareforpython.github.io/DBUtils/"
+Download = "https://pypi.org/project/DBUtils/"
+Documentation = "https://webwareforpython.github.io/DBUtils/main.html"
+Changelog = "https://webwareforpython.github.io/DBUtils/changelog.html"
+"Issue Tracker" = "https://github.com/WebwareForPython/DBUtils/issues"
+"Source Code" = "https://github.com/WebwareForPython/DBUtils"
+
+[tool.setuptools]
+packages = ["dbutils"]
+platforms = ["any"]
+include-package-data = false
+
 [tool.ruff]
 select = [
   "A",      # flake8-builtins