chore(deps-dev): bump @vue/cli-plugin-unit-jest from 3.12.1 to 4.5.15

Bumps [@vue/cli-plugin-unit-jest](https://github.com/vuejs/vue-cli/tree/HEAD/packages/@vue/cli-plugin-unit-jest) from 3.12.1 to 4.5.15.
- [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/v4.5.15/packages/@vue/cli-plugin-unit-jest)

---
updated-dependencies:
- dependency-name: "@vue/cli-plugin-unit-jest"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -45,7 +45,7 @@
     "@vue/cli-plugin-babel": "^3.4.0",
     "@vue/cli-plugin-e2e-cypress": "^3.4.0",
     "@vue/cli-plugin-eslint": "^3.4.0",
-    "@vue/cli-plugin-unit-jest": "^3.4.0",
+    "@vue/cli-plugin-unit-jest": "^4.5.15",
     "@vue/cli-service": "^3.4.0",
     "@vue/eslint-config-standard": "^4.0.0",
     "@vue/test-utils": "^1.1.3",