build: convert to static setuptools metadata

This is preferred and removes the crutch of invoking setup.py as a CLI
tool for building dists.

Signed-off-by: Joshua Lock <[email protected]>

Author: joshuagl

setup.cfg

@@ -1,6 +1,50 @@
 [metadata]
+name = tuf
+version = 0.19.0
+author = https://www.updateframework.com
+author_email = [email protected]
+description = A secure updater framework for Python
+long_description = file: README.md
+long_description_content_type = text/markdown
+url = https://www.updateframework.com
+project_urls =
+  Documentation = https://theupdateframework.readthedocs.io/en/stable/
+  Issues = https://github.com/theupdateframework/python-tuf/issues
+  Source = https://github.com/theupdateframework/python-tuf
+classifiers =
+  Development Status :: 4 - Beta
+  Intended Audience :: Developers
+  License :: OSI Approved :: MIT License
+  License :: OSI Approved :: Apache Software License
+  Operating System :: POSIX
+  Operating System :: POSIX :: Linux
+  Operating System :: MacOS :: MacOS X
+  Operating System :: Microsoft :: Windows
+  Programming Language :: Python :: 3
+  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 :: Implementation :: CPython
+  Topic :: Security
+  Topic :: Software Development
+keywords = update updater secure authentication key compromise revocation
 license_files = LICENSE LICENSE-MIT
 
+[options]
+packages = find:
+scripts =
+  tuf/scripts/repo.py
+  tuf/scripts/client.py
+python_requires = ~=3.6
+install_requires =
+  requests>=2.19.1
+  securesystemslib>=0.20.0
+
+[options.packages.find]
+exclude = tests
+
 [check-manifest]
 ignore =
   requirements-dev.txt