Changed python from 3.6 to 3.x

Author: evaherrada

.github/workflows/test.yml

@@ -10,10 +10,10 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - name: Set up Python 3.6
+    - name: Set up Python 3.x
       uses: actions/setup-python@v1
       with:
-        python-version: 3.6
+        python-version: "3.x"
     - name: Versions
       run: |
         python3 --version