Upgrade GH actions versions (#359)

Author: asherf

.github/workflows/ci.yml

@@ -41,11 +41,11 @@ jobs:
         ports:
           - 5432:5432
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
         fetch-depth: 0
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies