Bump @vue/babel-preset-app from 4.1.1 to 4.1.2

Bumps [@vue/babel-preset-app](https://github.com/vuejs/vue-cli/tree/HEAD/packages/@vue/babel-preset-app) from 4.1.1 to 4.1.2.
- [Release notes](https://github.com/vuejs/vue-cli/releases)
- [Changelog](https://github.com/vuejs/vue-cli/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vue-cli/commits/v4.1.2/packages/@vue/babel-preset-app

)

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