chore: add windows to os matrix for tests action workflow (#152)

* chore: add os matrix to tests action workflow

* chore: manually pass excluded py versions per os

Author: KingDarBoja

.github/workflows/tests.yml

@@ -4,41 +4,51 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       max-parallel: 4
       matrix:
         python-version: ["3.6", "3.7", "3.8", "3.9-dev", "pypy3"]
+        os: [ubuntu-latest, windows-latest]
+        exclude:
+          - os: windows-latest
+            python-version: "3.6"
+          - os: windows-latest
+            python-version: "3.7"
+          - os: windows-latest
+            python-version: "3.9-dev"
+          - os: windows-latest
+            python-version: "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 dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install tox tox-gh-actions
-    - name: Test with tox
-      run: tox
-      env:
-        TOXENV: ${{ matrix.toxenv }}
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install tox tox-gh-actions
+      - name: Test with tox
+        run: tox
+        env:
+          TOXENV: ${{ matrix.toxenv }}
 
   coverage:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v2
-      with:
-        python-version: 3.8
-    - name: Install test dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install .[test]
-    - name: Test with coverage
-      run: pytest --cov=gql --cov-report=xml tests
-    - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v1
+      - uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Install test dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install .[test]
+      - name: Test with coverage
+        run: pytest --cov=gql --cov-report=xml tests
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1