fix: fix --force flag

Author: yyx990803

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

@@ -10,8 +10,8 @@ const options = {
   }
 }
 
-assertServe('ts-default-serve', options)
-assertBuild('ts-default-build', options, async (project) => {
+assertServe('ts-class-serve', options)
+assertBuild('ts-class-build', options, async (project) => {
   const app = await project.read('src/App.vue')
   expect(app).toMatch(`export default class App extends Vue {`)
 })

packages/@vue/cli/bin/vue.js

@@ -127,7 +127,9 @@ function cleanArgs (cmd) {
   const args = {}
   cmd.options.forEach(o => {
     const key = o.long.replace(/^--/, '')
-    if (typeof cmd[key] === 'string') {
+    // if an option is not present and Command has a method with the same name
+    // it should not be copied
+    if (typeof cmd[key] !== 'function') {
       args[key] = cmd[key]
     }
   })