Bump @vue/cli-plugin-unit-jest from 3.10.0 to 4.0.3

Bumps [@vue/cli-plugin-unit-jest](https://github.com/vuejs/vue-cli/tree/HEAD/packages/@vue/cli-plugin-unit-jest) from 3.10.0 to 4.0.3.
- [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/v4.0.3/packages/@vue/cli-plugin-unit-jest)

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

package.json

@@ -23,7 +23,7 @@
     "@fullhuman/postcss-purgecss": "^1.2.0",
     "@vue/cli-plugin-babel": "^3.6.0",
     "@vue/cli-plugin-eslint": "^3.6.0",
-    "@vue/cli-plugin-unit-jest": "^3.6.3",
+    "@vue/cli-plugin-unit-jest": "^4.0.3",
     "@vue/cli-service": "^3.10.0",
     "@vue/eslint-config-standard": "^4.0.0",
     "@vue/test-utils": "1.0.0-beta.29",