Configure GitHub actions.

.github/workflows/python.yml

@@ -0,0 +1,50 @@
+name: Python package
+
+on: [push]
+
+jobs:
+  test:
+    runs-on: ubuntu-18.04
+
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [2.7, 3.4, 3.5, 3.6, 3.7, 3.8, pypy3]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install build and test dependencies
+        run: pip install flake8 tox setuptools_scm==3.5.0
+      # TODO: Disabled because it finds many issues
+      #- name: Lint with flake8
+      #  run: tox -e flake8
+      - name: Test with tox
+        # Run tox using the version of Python in PATH
+        run: tox -e py
+
+  build:
+    runs-on: ubuntu-18.04
+
+    needs: test
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Install build dependencies
+        run: pip install setuptools_scm==3.5.0 wheel
+      - name: Build
+        run: python setup.py sdist bdist_wheel
+      - name: Publish to PyPI
+        if: startsWith(github.ref, 'refs/tags')
+        uses: pypa/gh-action-pypi-publish@release/v1.4
+        with:
+          user: __token__
+          # Token is set in project's settings
+          password: ${{ secrets.PYPI_API_TOKEN }}

setup.py

@@ -32,7 +32,7 @@
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6'
     ],
-    setup_requires=['setuptools_scm >= 1.7.0'],
+    setup_requires=['setuptools_scm == 3.5.0'],
     extras_require={
         ':python_version == "2.7"': 'typing',
         ':python_version == "3.3"': 'typing >= 3.5',

tox.ini

@@ -1,18 +1,8 @@
 [tox]
 minversion = 2.5.0
-envlist = {pypy3,py27,py34,py35,py36}-{typing}
+envlist = {pypy3,py27,py34,py35,py36,py37,py38}-{typing}
 skip_missing_interpreters = true
 
-[travis]
-python =
-    pypy3: pypy3
-    2.7: py27
-    3.4: py34
-    3.5.2: py35
-    3.5.3: py35
-    3.6: py36
-    3.7: py37
-
 [testenv]
 commands = python tests/test_typechecker.py