Vuepress can not run build, Vue latest version is @3.0.0 , but SSR only @2.6.12

[veaba]

Impact on all newly built vuepress projects。

details：

F:\Github\vue-docs\node_modules\_vue-server-renderer@2.6.12@vue-server-renderer\index.js:8
  throw new Error(
  ^

Error:

Vue packages version mismatch:

- vue@3.0.0
- vue-server-renderer@2.6.12

This may cause things to work incorrectly. Make sure to use the same version for both.

    at Object.<anonymous> (F:\Github\vue-docs\node_modules\_vue-server-renderer@2.6.12@vue-server-renderer\index.js:8:9)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
    at Function.Module._load (internal/modules/cjs/loader.js:529:3)
    at Module.require (internal/modules/cjs/loader.js:636:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (F:\Github\vue-docs\node_modules\_@vuepress_core@1.5.4@@vuepress\core\lib\node\build\index.js:11:34)
    at Module._compile (internal/modules/cjs/loader.js:688:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
    at Module.load (internal/modules/cjs/loader.js:598:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
    at Function.Module._load (internal/modules/cjs/loader.js:529:3)
    at Module.require (internal/modules/cjs/loader.js:636:17)
    at require (internal/modules/cjs/helpers.js:20:18)