Support Python 3.9

Author: Cito

.travis.yml

@@ -4,6 +4,9 @@ matrix:
     - name: Code quality tests
       env: TOXENV=black,flake8,mypy,docs,manifest
       python: 3.8
+    - name: Unit tests with Python 3.9
+      env: TOXENV=py38
+      python: 3.8
     - name: Unit tests with Python 3.8
       env: TOXENV=py38
       python: 3.8

pyproject.toml

@@ -20,7 +20,8 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8"
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9"
 ]
 packages = [
     { include = "graphql", from = "src" },

setup.py

@@ -28,6 +28,7 @@
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
     ],
     install_requires=[],
     python_requires=">=3.6,<4",

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{36,37,38}, black, flake8, mypy, docs, manifest
+envlist = py{36,37,38,39}, black, flake8, mypy, docs, manifest
 isolated_build = true
 
 [testenv:black]