Add Python 3.9 support & testing

- Drop 'linting' job as we now rely on pre-commit.ci

Author: nicoddemus

.github/workflows/main.yml

@@ -53,14 +53,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["3.6", "3.7", "3.8"]
+        python: ["3.6", "3.7", "3.8", "3.9"]
         include:
           - python: "3.6"
             tox_env: "py36-pytestlatest"
           - python: "3.7"
             tox_env: "py37-pytestlatest"
           - python: "3.8"
-            tox_env: "py38-pytestlatest py38-pytest53"
+            tox_env: "py38-pytestlatest"
+          - python: "3.9"
+            tox_env: "py39-pytestlatest py39-pytest53"
 
     steps:
     - uses: actions/checkout@v1
@@ -81,31 +83,13 @@ jobs:
       run: |
         tox -e ${{ matrix.tox_env }}
 
-  linting:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python
-      uses: actions/setup-python@v1
-      with:
-        python-version: "3.7"
-    - name: Install tox
-      run: |
-        python -m pip install --upgrade pip
-        pip install tox
-    - name: Linting
-      run: |
-        tox -e linting
-
   deploy:
 
     if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
 
     runs-on: ubuntu-latest
 
-    needs: [test, linting]
+    needs: test
 
     steps:
     - uses: actions/checkout@v1

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",
         "Programming Language :: C++",
         "Topic :: Software Development :: Quality Assurance",
         "Topic :: Software Development :: Testing",

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{36,37,38}-pytestlatest,py38-pytest53
+envlist = py{36,37,38,39}-pytestlatest,py39-pytest53
 
 [testenv]
 deps=
@@ -11,7 +11,7 @@ deps=
     coverage
 commands=
     pytest tests
-    pytest -n8 tests
+    pytest -n2 tests
 
 [testenv:linting]
 skipsdist = True