fix(typescript): add missing dependencies and require.resolve compiler (#6456)

packages/@vue/cli-plugin-typescript/index.js

@@ -85,7 +85,7 @@ module.exports = (api, projectOptions) => {
             extensions: {
               vue: {
                 enabled: true,
-                compiler: isVue3 ? '@vue/compiler-sfc' : 'vue-template-compiler'
+                compiler: isVue3 ? require.resolve('@vue/compiler-sfc') : require.resolve('vue-template-compiler')
               }
             },
             diagnosticOptions: {

packages/@vue/cli-plugin-typescript/package.json

@@ -25,6 +25,7 @@
   "dependencies": {
     "@types/webpack-env": "^1.15.2",
     "@vue/cli-shared-utils": "^5.0.0-beta.0",
+    "@babel/core": "^7.12.16",
     "babel-loader": "^8.2.2",
     "cache-loader": "^4.1.0",
     "fork-ts-checker-webpack-plugin": "^6.1.0",
@@ -37,11 +38,15 @@
   "peerDependencies": {
     "@vue/cli-service": "^3.0.0 || ^4.0.0 || ^5.0.0-0",
     "@vue/compiler-sfc": "^3.0.0-beta.14",
+    "vue-template-compiler": "^2.0.0",
     "typescript": ">=2"
   },
   "peerDependenciesMeta": {
     "@vue/compiler-sfc": {
       "optional": true
+    },
+    "vue-template-compiler": {
+      "optional": true
     }
   },
   "devDependencies": {