Bump actions/setup-python from 1 to 3 (#264)

Author: dependabot[bot]

.github/workflows/deploy.yml

@@ -20,7 +20,7 @@ jobs:
     - uses: actions/checkout@v2
       with:
         fetch-depth: 0
-    - uses: actions/setup-python@v1
+    - uses: actions/setup-python@v3
       with:
         python-version: '3.x'
     - run: pip3 install -r requirements.txt

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-python@v1
+    - uses: actions/setup-python@v3
       with:
         python-version: '3.x'
     - run: pip3 install -r requirements.txt