Increment version numbers in CI configuration

.github/workflows/main.yml

@@ -16,12 +16,12 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7]
+        python-version: ["3.9"]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install Fish
@@ -42,7 +42,7 @@ jobs:
       - name: Check for release
         if: github.ref == 'refs/heads/main'
         run: |
-          python -m pip install githubrelease httpx==0.16.1 autopub
+          python -m pip install githubrelease httpx==0.18.2 autopub
           echo "##[set-output name=release;]$(autopub check)"
         id: check_release
       - name: Deploy