use new POSTGRES_URL option in tests

Author: yuyuyureka

.github/workflows/test.yml

@@ -37,4 +37,4 @@ jobs:
             - name: Run Tests
               run: go test -v ./...
               env:
-                  POSTGRES_PASSWORD: oui
+                  POSTGRES_URL: postgresql://oui:oui@localhost/oui?sslmode=disable