Update dependency vue-i18n to v9.1.2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
vue-i18n	9.1.1 -> 9.1.2

---

Release Notes

intlify/vue-i18n-next

### [`v9.1.2`](https://togithub.com/intlify/vue-i18n-next/blob/master/CHANGELOG.md#v912-2021-04-08) [Compare Source](https://togithub.com/intlify/vue-i18n-next/compare/v9.1.1...v9.1.2) ##### :bug: Bug Fixes - `vue-i18n` - [#​441](https://togithub.com/intlify/vue-i18n-next/pull/441) fix: typing errors ([@​kazupon](https://togithub.com/kazupon)) ##### Committers: 1 - kazuya kawaguchi ([@​kazupon](https://togithub.com/kazupon))

---

Configuration

:date: Schedule: At any time (no schedule defined).

:vertical_traffic_light: Automerge: Enabled.

:recycle: Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

:no_bell: Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box.

---

This PR has been generated by WhiteSource Renovate. View repository job log here.