Update vue monorepo to v4.5.19

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@vue/cli-plugin-eslint	4.5.18 -> 4.5.19
@vue/cli-plugin-pwa	4.5.18 -> 4.5.19
@vue/cli-plugin-router	4.5.18 -> 4.5.19
@vue/cli-plugin-typescript	4.5.18 -> 4.5.19
@vue/cli-plugin-vuex	4.5.18 -> 4.5.19
@vue/cli-service (source)	4.5.18 -> 4.5.19

---

Release Notes

vuejs/vue-cli

### [`v4.5.19`](https://togithub.com/vuejs/vue-cli/releases/tag/v4.5.19) [Compare Source](https://togithub.com/vuejs/vue-cli/compare/v4.5.18...v4.5.19) IMPORTANT NOTE: [IE 11 has reached End-of-Life](https://docs.microsoft.com/en-us/lifecycle/faq/internet-explorer-microsoft-edge#what-is-the-lifecycle-policy-for-internet-explorer-). The default `browserslist` query no longer includes IE 11 as a target. If your project still has to support IE 11, you **MUST** manually add `IE 11` to the last line of the `.browserslistrc` file in the project (or `browserslist` field in `package.json`) ##### :bug: Bug Fix - `@vue/babel-preset-app` - \[[c7fa1cf](https://togithub.com/vuejs/vue-cli/commit/c7fa1cf)] fix: always transpile syntaxes introduced in ES2020 or later, so that optional chaining and nullish coalescing syntaxes won't cause errors in webpack 4 and ESLint 6. - `@vue/cli-plugin-typescript` - \[[5b57792](https://togithub.com/vuejs/vue-cli/commit/5b57792)] fix: typechecking with Vue 2.7, fixes [#​7213](https://togithub.com/vuejs/vue-cli/issues/7213)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

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

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• [ ] If you want to rebase/retry this PR, click this checkbox.

---

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