test: improve tslint test case (test fixing vue files)

packages/@vue/cli-plugin-typescript/__tests__/tsPluginLint.spec.js

@@ -13,10 +13,22 @@ test('should work', async () => {
   const { read, write, run } = project
   const main = await read('src/main.ts')
   expect(main).toMatch(';')
+  const app = await read('src/App.vue')
+  expect(main).toMatch(';')
   // remove semicolons
   const updatedMain = main.replace(/;/g, '')
   await write('src/main.ts', updatedMain)
+  // for Vue file, only remove semis in script section
+  const updatedApp = app.replace(/<script(.|\n)*\/script>/, $ => {
+    return $.replace(/;/g, '')
+  })
+  await write('src/App.vue', updatedApp)
   // lint
   await run('vue-cli-service lint')
   expect(await read('src/main.ts')).toMatch(';')
+
+  const lintedApp = await read('src/App.vue')
+  expect(lintedApp).toMatch(';')
+  // test if tslint is fixing vue files properly
+  expect(lintedApp).toBe(app)
 })