fix: editing styles in ssr mode does not update the view in time

[litingyes]

issue #91

[yyx990803]

Thanks a lot for the PR - I noticed we need to access file.compiled.css to track it in all cases, but we still want to avoid injecting CSS when SSR is true. See https://github.com/vuejs/repl/commit/3b7e51126dd32e4ebf36b9bd492f1c117ac9de69