add build job to test install of wheels

.github/workflows/build.yml

@@ -45,8 +45,29 @@ jobs:
           name: wheelhouse
           path: ./dist/*.tar.gz
 
-  upload_pypi:
+  test_install:
+    name: Test install on ${{ matrix.os }} / ${{ matrix.python-version }} / ${{ matrix.architecture }}
     needs: [build_wheels, build_sdist]
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest]
+        python-version: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9", "pypy-2.7", "pypy-3.6", "pypy-3.7"]
+        architecture: ["x64", "x86"]
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+          architecture: ${{ matrix.architecture }}
+      - uses: actions/download-artifact@v2
+        with:
+          name: wheelhouse
+          path: dist
+      - run: pip install --no-index --find-links=./dist sysaudit
+
+  upload_pypi:
+    needs: [test_install]
     runs-on: ubuntu-latest
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
     steps: