Update setup-python to v2

Author: amureki

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
   black:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-python@v1
+      - uses: actions/setup-python@v2
       - uses: actions/checkout@v2
       - run: python -m pip install black
       - run: black --check --diff .
@@ -75,7 +75,7 @@ jobs:
       run: python setup.py test
     - run: codecov
       env:
-        CODECOV_TOKEN: ${{secrets.CODECOV_TOKEN}}
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
   extras:
     needs:
@@ -103,4 +103,4 @@ jobs:
         run: python setup.py test
       - run: codecov
         env:
-          CODECOV_TOKEN: ${{secrets.CODECOV_TOKEN}}
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}