Add code style check and fix commands

.github/workflows/tests.yml

@@ -5,33 +5,19 @@ jobs:
     name: Setup Environment
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: 3.8
-    - uses: actions/cache@v3
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-pip-
-    - name: Install dependencies
-      run: pip install -r requirements.txt
+        cache: 'pip'
+    - run: pip install -r requirements.txt
 
   code-style:
     name: Code style
     runs-on: ubuntu-latest
     needs: setup
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
-      with:
-        python-version: 3.8
-    - name: Use pip cache
-      uses: actions/cache@v3
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
+    - uses: actions/checkout@v4
     - name: Check
       run: black . --check
 
@@ -65,7 +51,7 @@ jobs:
     name: Check Unbound list
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Install Unbound
       run: sudo apt-get update && sudo apt-get install -y unbound
     - name: Check unbound list