Fix for CI.

Author: mindflayer

.github/workflows/main.yml

@@ -5,15 +5,15 @@ on: push
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.5", "3.6", "3.7", "3.8", "3.9", "3.10", "pypy3"]
+        python-version: ['3.5', '3.6', '3.7', '3.8', '3.9', '3.10', 'pypy3.9']
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - 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 Redis