Update test matrix, include Django 4.0b1

.github/workflows/tests.yaml

@@ -0,0 +1,74 @@
+name: CI Testing
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  test:
+    name: "Python ${{ matrix.python }} Django ${{ matrix.django }}"
+    runs-on: ubuntu-latest
+    strategy:
+      # max-parallel: 8  # default is max available
+      fail-fast: false
+      matrix:
+        include:
+          # Django 2.2
+          - django: "2.2"
+            python: "3.6"
+          - django: "2.2"
+            python: "3.7"
+          - django: "2.2"
+            python: "3.8"
+          - django: "2.2"
+            python: "3.9"
+          # Django 3.1
+          - django: "3.1"
+            python: "3.6"
+          - django: "3.1"
+            python: "3.7"
+          - django: "3.1"
+            python: "3.8"
+          - django: "3.1"
+            python: "3.9"
+          # Django 3.2
+          - django: "3.2"
+            python: "3.6"
+          - django: "3.2"
+            python: "3.7"
+          - django: "3.2"
+            python: "3.8"
+          - django: "3.2"
+            python: "3.9"
+          - django: "3.2"
+            python: "3.10"
+          # Django 4.0
+          - django: "4.0b1"
+            python: "3.10"
+
+    steps:
+      #- name: Install gettext
+      #  run: sudo apt-get install -y gettext
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup Python ${{ matrix.python }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python }}
+
+      - name: Install Packages
+        run: |
+          python -m pip install -U pip
+          python -m pip install "Django~=${{ matrix.django }}" codecov -e .[tests]
+
+      - name: Run Tests
+        run: |
+          echo "Python ${{ matrix.python }} / Django ${{ matrix.django }}"
+          coverage run --rcfile=.coveragerc runtests.py
+          codecov
+        continue-on-error: ${{ contains(matrix.django, '4.0') }}

tox.ini

@@ -2,8 +2,9 @@
 envlist=
     py36-django{22,30,31},
     py37-django{22,30,31},
-    py38-django{22,30,31},
-    # py33-django-dev,
+    py38-django{22,30,31,32},
+    py39-django{40},
+    # py39-django-dev,
     coverage,
     docs,
 
@@ -12,6 +13,8 @@ deps = django-polymorphic
     django22: Django >= 2.2,<2.3
     django30: Django >= 3.0,<3.1
     django31: Django >= 3.1,<3.2
+    django32: Django >= 3.1,<3.2
+    django40: Django==4.0b1
     django-dev: https://github.com/django/django/tarball/master
 commands=
     python runtests.py
@@ -27,7 +30,7 @@ commands = sphinx-build -W -b html -d {envtmpdir}/doctrees . {envtmpdir}/html
 [testenv:coverage]
 basepython=python3.6
 deps=
-    django==3.0
+    django==3.2
     coverage==4.4.1
 commands=
     coverage erase