Use explicit matrix to configure GH jobs

Excluding PyPy2/3 on Windows for now, as the build is crashing
randomly.

Author: nicoddemus

.github/workflows/main.yml

@@ -10,23 +10,83 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9", "pypy-3.7"]
-        os: [ubuntu-latest, windows-latest]
+        name: [
+            "windows-py27",
+            "windows-py35",
+            "windows-py36",
+            "windows-py37",
+            "windows-py38",
+            "windows-py39",
+
+            "linux-py27",
+            "linux-py35",
+            "linux-py36",
+            "linux-py37",
+            "linux-py38",
+            "linux-py39",
+
+            "linux-pypy2",
+            "linux-pypy3",
+        ]
         include:
-          - python: "2.7"
+          - name: "windows-py27"
+            python: "2.7"
             tox_env: "py27"
-          - python: "3.5"
+            os: "windows-latest"
+          - name: "windows-py35"
+            python: "3.5"
             tox_env: "py35"
-          - python: "3.6"
+            os: "windows-latest"
+          - name: "windows-py36"
+            python: "3.6"
             tox_env: "py36"
-          - python: "3.7"
+            os: "windows-latest"
+          - name: "windows-py37"
+            python: "3.7"
             tox_env: "py37"
-          - python: "3.8"
+            os: "windows-latest"
+          - name: "windows-py38"
+            python: "3.8"
             tox_env: "py38"
-          - python: "3.9"
+            os: "windows-latest"
+          - name: "windows-py39"
+            python: "3.9"
             tox_env: "py39"
-          - python: "pypy-3.7"
+            os: "windows-latest"
+
+          - name: "linux-py27"
+            python: "2.7"
+            tox_env: "py27"
+            os: "ubuntu-latest"
+          - name: "linux-py35"
+            python: "3.5"
+            tox_env: "py35"
+            os: "ubuntu-latest"
+          - name: "linux-py36"
+            python: "3.6"
+            tox_env: "py36"
+            os: "ubuntu-latest"
+          - name: "linux-py37"
+            python: "3.7"
+            tox_env: "py37"
+            os: "ubuntu-latest"
+          - name: "linux-py38"
+            python: "3.8"
+            tox_env: "py38"
+            os: "ubuntu-latest"
+          - name: "linux-py39"
+            python: "3.9"
+            tox_env: "py39"
+            os: "ubuntu-latest"
+
+          - name: "linux-pypy2"
+            python: "pypy-2.7"
+            tox_env: "pypy2"
+            os: "ubuntu-latest"
+          - name: "linux-pypy3"
+            python: "pypy-3.7"
             tox_env: "pypy3"
+            os: "ubuntu-latest"
 
     steps:
     - uses: actions/checkout@v1
@@ -42,31 +102,13 @@ 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: [build, linting]
+    needs: build
 
     steps:
     - uses: actions/checkout@v1