chore(gh-actions): add python setup

Author: Natalie

.github/workflows/run-test.yml

@@ -50,6 +50,9 @@ jobs:
         name: drafter
 
     - run: npm install
+    - uses: actions/setup-python@v2
+      with:
+        python-version: '2.x'
     - run: 
         command: |
         cd ext/protagonist/drafter