Merge wheel artifacts

.github/workflows/package.yaml

@@ -6,6 +6,24 @@ env:
   MOPAC_VERSION: 23.1.2
 
 jobs:
+  build-src:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build package
+        shell: bash
+        run: |
+          pip install build
+          python -m build
+
+      - name: Save wheel artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: src-tarball
+          path: dist/*.gz
+
   build-wheel:
     name: Build on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
@@ -66,10 +84,17 @@ jobs:
 #        shell: bash
 #        run: |
 #          pip install twine==6.0.1
-#          python -m twine upload --repository testpypi dist/*
+#          python -m twine upload --repository testpypi dist/*.whl
 
       - name: Save wheel artifacts
         uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.os }}-wheel
-          path: dist
+          path: dist/*.whl
+
+  merge:
+    runs-on: ubuntu-latest
+    needs: [build-src, build-wheel]
+    steps:
+      - name: Merge Artifacts
+        uses: actions/upload-artifact/merge@v4