multiple pythons, better upload script

Author: rozyczko

.github/workflows/build.yaml

@@ -4,7 +4,14 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: windows-2019
+    strategy:
+      max-parallel: 4
+      matrix:
+        python-version: ['3.8', '3.9', '3.10']
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    # runs-on: ${{ matrix.os }}
+    runs-on: windows-latest
     steps:
     - name: Check-out repository
       uses: actions/checkout@v2
@@ -13,7 +20,7 @@ jobs:
       uses: s-weigand/setup-conda@v1
       with:
         update-conda: true
-        python-version: 3.8
+        python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
       run: |
@@ -29,20 +36,25 @@ jobs:
 
   upload:
     needs: build
-    runs-on: windows-2019
+    runs-on: ubuntu-latest
     steps:
 
-    - name: Upload zipped offline app installer to GitHub releases
-      uses: ncipollo/release-action@v1
+    - uses: actions/upload-artifact@v2
       with:
-        draft: true
-        prerelease: true
-        allowUpdates: true
-        replacesArtifacts: true
-        token: ${{ secrets.GITHUB_TOKEN }}
-        artifacts: ./**/*.whl
-        tag: 1.4.1
-        body: This is an alpha build of diffpy2
+        name: diffpy2 - Python ${{ matrix.python-version }}
+        path: ${{ github.workspace }}/dist/*
+
+    # - name: Upload zipped offline app installer to GitHub releases
+    #   uses: ncipollo/release-action@v1
+    #   with:
+    #     draft: true
+    #     prerelease: true
+    #     allowUpdates: true
+    #     replacesArtifacts: true
+    #     token: ${{ secrets.GITHUB_TOKEN }}
+    #     artifacts: dist/*.whl
+    #     tag: 1.4.1
+    #     body: This is an alpha build of diffpy2
 
 
   # upload: