fix: make exports prop of proxy point to exports object (#1260)

packages/vite-node/src/client.ts

@@ -168,7 +168,7 @@ export class ViteNodeRunner {
         exports.default = value
       },
       get exports() {
-        return exports.default
+        return exports
       },
     }
 

test/core/src/module-cjs.ts

@@ -0,0 +1,2 @@
+module.exports.a = 1
+module.exports.b = 2

test/core/src/module-esm.ts

@@ -0,0 +1,3 @@
+const c = 1
+export default c
+export const d = 2

test/core/test/module.test.ts

@@ -0,0 +1,15 @@
+import { expect, it } from 'vitest'
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-expect-error
+import { a, b } from '../src/module-cjs'
+import c, { d } from '../src/module-esm'
+
+it('should work when using cjs module', () => {
+  expect(a).toBe(1)
+  expect(b).toBe(2)
+})
+
+it('should work when using esm module', () => {
+  expect(c).toBe(1)
+  expect(d).toBe(2)
+})