change python-version to 3.7

Author: peiyun@inj21

…ithub/workflows/publish-to-test-pypi.yml .github/workflows/publish-to-pypi.yml.github/workflows/publish-to-test-pypi.yml renamed to .github/workflows/publish-to-pypi.yml .github/workflows/publish-to-test-pypi.yml renamed to .github/workflows/publish-to-pypi.yml

@@ -13,10 +13,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@master
-    - name: Set up Python 3.6
+    - name: Set up Python 3.7
       uses: actions/setup-python@v1
       with:
-        python-version: 3.6
+        python-version: 3.7
     - name: Install pypa/build
       run: >-
         python -m