Adding memcached to test workflow

Author: linsomniac

.github/workflows/main.yml

@@ -15,6 +15,10 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
+      - name: Set up Memcached
+        run: |
+          apt update
+          apt -y install memcached
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip