Switch DNS resolution to prefer IPv4 in tests

In the Cloudflare Workers local tests, Node seems to prefer resolving to
IPv6, but the Wrangler server is only listening to IPv4, which results
in "connection refused" errors. Fix the problem by forcing Node to
prefer IPv4 for DNS resolution.

.github/workflows/ci.yaml

@@ -95,19 +95,19 @@ jobs:
       run: "cd smoke_test/workers && npm link ../.."
 
     - name: "Local test with Hrana 1 over WebSocket"
-      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v1.py node test.js"
+      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v1.py node --dns-result-order=ipv4first test.js"
       env: {"LOCAL": "1", "URL": "ws://localhost:8080"}
     - name: "Local test with Hrana 2 over WebSocket"
-      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v2.py node test.js"
+      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v2.py node --dns-result-order=ipv4first test.js"
       env: {"LOCAL": "1", "URL": "ws://localhost:8080"}
     - name: "Local test with Hrana 2 over HTTP"
-      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v2.py node test.js"
+      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v2.py node --dns-result-order=ipv4first test.js"
       env: {"LOCAL": "1", "URL": "http://localhost:8080"}
 #    - name: "Local test with Hrana 3 over WebSocket"
-#      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v3.py node test.js"
+#      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v3.py node --dns-result-order=ipv4first test.js"
 #      env: {"LOCAL": "1", "URL": "ws://localhost:8080"}
 #    - name: "Local test with Hrana 3 over HTTP"
-#      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v3.py node test.js"
+#      run: "cd smoke_test/workers && python ../../hrana-test-server/server_v3.py node --dns-result-order=ipv4first test.js"
 #      env: {"LOCAL": "1", "URL": "http://localhost:8080"}
 
     # - name: "Non-local test with Hrana 1 over WebSocket"