add services to test workflow of GitHub Actions (#5)

.github/workflows/test.yml

@@ -14,6 +14,32 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
+    services:
+      mysql:
+        image: mysql
+        env:
+          MYSQL_ROOT_PASSWORD: root
+          MYSQL_DATABASE: test
+        ports:
+          - 3306:3306
+      postgres:
+        image: postgres
+        env:
+          POSTGRES_PASSWORD: postgres
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+      mssql:
+        image: mcr.microsoft.com/mssql/server:2022-latest
+        env:
+          MSSQL_SA_PASSWORD: "Password123"
+          ACCEPT_EULA: "Y"
+        ports:
+          - 1433:1433
     steps:
       - name: checkout
         uses: actions/checkout@v2