fix python2 support

.github/workflows/python-publish.yml

@@ -14,19 +14,33 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python
+
+    - name: Set up Python 3.x
       uses: actions/setup-python@v2
       with:
         python-version: '3.x'
-    - name: Install dependencies
+
+    - name: Set up Python 2.x
+      uses: actions/setup-python@v2
+      with:
+        python-version: '2.x'
+
+    - name: Install dependencies 3.x
       run: |
         python -m pip install --upgrade pip
         pip install setuptools wheel twine
+
+    - name: Install dependencies 2.x
+      run: |
+        python2 -m pip install --upgrade pip
+        pip2 install setuptools
+
     - name: Build and publish
       env:
         TWINE_USERNAME: ${{ secrets.TWINE_USERNAME }}
         TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
       run: |
-        python setup.py sdist bdist_wheel
-        python3 -m twine check dist/*
+        python3 setup.py sdist bdist_wheel
+        python2 setup.py sdist bdist_wheel
+        twine check dist/*
         twine upload dist/*