Update pythonpackage.yml

.github/workflows/pythonpackage.yml

@@ -7,14 +7,16 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-16.04, windows-2019, windows-2016, macOS-10.14, macOS-10.13]
+        os: [ubuntu-18.04, ubuntu-16.04, windows-2019, windows-2016, macOS-10.14]
         python-version: [3.5, 3.6, 3.7]
+        architecture: [x86, x64]
     steps:
     - uses: actions/checkout@v1
     - name: Set up $(( matrix.runs-on )) Python ${{ matrix.python-version }}
       uses: actions/setup-python@v1
       with:
         python-version: ${{ matrix.python-version }}
+        architecture: ${{ matrix.architecture }}
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip