Small infrastructure updates

.travis.yml

@@ -53,6 +53,11 @@ matrix:
           env: PYTHON_VERSION=3.8
                TOXENV=py38-test-pytest53
 
+        - language: python
+          python: 3.8
+          name: Python 3.8 and pytest 6.0 (Linux)
+          env: TOXENV=py38-test-pytest60
+
         - os: osx
           name: Python 3.8 and pytest dev (MacOS X)
           env: PYTHON_VERSION=3.8

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools",
+requires = ["setuptools>=30.3.0",
             "setuptools_scm",
             "wheel"]
 build-backend = 'setuptools.build_meta'

setup.cfg

@@ -44,3 +44,6 @@ exclude =
 [tool:pytest]
 minversion = 4.6
 testpaths = tests
+
+[flake8]
+max-line-length = 100

setup.py

@@ -1,15 +1,6 @@
 #!/usr/bin/env python
 
 import os
-import sys
-import setuptools
-from distutils.version import LooseVersion
 from setuptools import setup
 
-# Setuptools 30.3.0 or later is needed for setup.cfg options to be used
-if LooseVersion(setuptools.__version__) < LooseVersion('30.3.0'):
-    sys.stderr.write("ERROR: sphinx-automodapi requires setuptools 30.3.0 or "
-                     "later (found {0})".format(setuptools.__version__))
-    sys.exit(1)
-
 setup(use_scm_version={'write_to': os.path.join('pytest_openfiles', 'version.py')})

tox.ini

@@ -16,6 +16,7 @@ deps =
     pytest51: pytest==5.1.*
     pytest52: pytest==5.2.*
     pytest53: pytest==5.3.*
+    pytest60: pytest==6.0.*
     pytestdev: git+https://github.com/pytest-dev/pytest#egg=pytest
 
 commands =