Merge pull request #1208 from ocefpaf/pep_517_518

add pyproject.toml to ensure build deps are present at build time

Author: jswhit

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools>=41.2", "cython>=0.19", "oldest-supported-numpy"]
+build-backend = "setuptools.build_meta"

setup.py

@@ -3,11 +3,10 @@
 import shutil
 import configparser
 from setuptools import setup, Extension, find_namespace_packages
-from distutils.dist import Distribution
+from setuptools.dist import Distribution
 
 setuptools_extra_kwargs = {
     "install_requires": ["numpy>=1.9","cftime"],
-    "setup_requires": ['setuptools>=18.0', "cython>=0.19"],
     "entry_points": {
         'console_scripts': [
             'ncinfo = netCDF4.utils:ncinfo',