Update vue-jest requirement from ^2.6.0 to ^3.0.0

Updates the requirements on [vue-jest](https://github.com/eddyerburgh/vue-jest) to permit the latest version.
- [Release notes](https://github.com/eddyerburgh/vue-jest/releases)
- [Commits](https://github.com/eddyerburgh/vue-jest/commits/v3.0.0)

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

package.json

@@ -68,7 +68,7 @@
 		"stylelint-config-recommended-scss": "^3.2.0",
 		"stylelint-scss": "^3.1.3",
 		"stylelint-webpack-plugin": "^0.10.5",
-		"vue-jest": "^2.6.0",
+		"vue-jest": "^3.0.0",
 		"vue-loader": "^15.4.2",
 		"vue-template-compiler": "^2.5.16",
 		"webpack": "^4.18.1",