build(deps-dev): update babel-jest requirement from 23.6.0 to 24.8.0

Updates the requirements on [babel-jest](https://github.com/facebook/jest/tree/HEAD/packages/babel-jest) to permit the latest version.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/jest/commits/v24.8.0/packages/babel-jest)

package.json

@@ -80,7 +80,7 @@
     "@vue/test-utils": "1.0.0-beta.29",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "10.0.1",
-    "babel-jest": "23.6.0",
+    "babel-jest": "24.8.0",
     "chalk": "2.4.2",
     "chokidar": "2.1.5",
     "connect": "3.6.6",