Move to setup.py-less build

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ['setuptools', 'wheel']
+build-backend = 'setuptools.build_meta'

setup.cfg

@@ -1,5 +1,23 @@
 [metadata]
+name = simplefractions
+version = 1.2.0
+url = "https://github.com/mdickinson/simplefractions"
+author = Mark Dickinson
+author_email = dickinsm@gmail.com
+classifiers =
+    License :: OSI Approved :: Apache Software License
+    Operating System :: OS Independent
+    Programming Language :: Python :: 3
+    Topic :: Scientific/Engineering :: Mathematics
 license_files = LICENSE
+description = "Find the simplest fraction for a given float or interval"
+long_description = file: README.md
+long_description_content_type = text/markdown
+keywords = fractions, continued fractions, approximation
+
+[options]
+packages = find:
+python_requires = >= 3.6
 
 [flake8]
 max-line-length = 88