Fix aiopg tests runner hanging (#297)

Author: rafalp

.github/workflows/test-suite.yml

@@ -47,5 +47,5 @@ jobs:
         run: "scripts/install"
       - name: "Run tests"
         env:
-          TEST_DATABASE_URLS: "sqlite:///testsuite, mysql://username:password@localhost:3306/testsuite, postgresql://username:password@localhost:5432/testsuite, postgresql+aiopg://username:password@localhost:5432/testsuite"
+          TEST_DATABASE_URLS: "sqlite:///testsuite, mysql://username:password@localhost:3306/testsuite, postgresql://username:password@localhost:5432/testsuite, postgresql+aiopg://username:password@127.0.0.1:5432/testsuite"
         run: "scripts/test"