fix: use default export for node mocks (cjs compat)

src.runtime/node/http/index.ts

@@ -1,3 +1,10 @@
-export * from './consts'
-export * from './request'
-export * from './response'
+import { METHODS, STATUS_CODES } from './consts'
+import { IncomingMessage } from './request'
+import { ServerResponse } from './response'
+
+export default {
+  METHODS,
+  STATUS_CODES,
+  IncomingMessage,
+  ServerResponse
+}

src.runtime/node/net/index.ts

@@ -1 +1,5 @@
-export * from './socket'
+import { Socket } from './socket'
+
+export default {
+  Socket
+}

src.runtime/node/stream/index.ts

@@ -1,2 +1,7 @@
-export * from './readable'
-export * from './writable'
+import { Readable } from './readable'
+import { Writable } from './writable'
+
+export default {
+  Readable,
+  Writable
+}