Publish python 2 and 3 github action

.github/workflows/python-publish.yml

@@ -10,12 +10,15 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [2.7, 3.6]
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python
+    - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:
-        python-version: '3.x'
+        python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip