cache in tests

Author: lovasoa

.github/workflows/tests.yml

@@ -36,6 +36,8 @@ jobs:
         database: ['postgres', 'mysql', 'mssql']
     steps:
     - uses: actions/checkout@v3
+    - name: Set up cargo cache
+      uses: Swatinem/rust-cache@dd05243424bd5c0e585e4b55eb2d7615cdd32f1f
     - name: Start database container
       run: docker-compose up -d ${{ matrix.database }}
     - name: Run tests against ${{ matrix.database }}