fix(plugin-vue): rewrite default after ts compiled

[underfin]

fix: #3542

Description

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[patak-cat]

Independently from this PR, should the replacements for the class check logic also update the source map? (i.e. using magic string for scriptCode)

[underfin]

@patak-js i removed class check. The sourcemap shouldn‘t affect for users, becuase only has cloumn changed, if this line has some error, the users also can realize error and fix it.

[patak-cat]

@underfin the class check can now be safely removed because @vue/compiler-sfc has been updated as indicated in the comment?

[hmt]

updating from @vitejs/plugin-vue@1.2.2 to @vitejs/plugin-vue@1.2.3 throws an error for me:

Uncaught SyntaxError: duplicate export name 'default'

If I had any clue where this came from, I'd post it here but I have no idea how to reproduce it.