Bump @babel/core from 7.5.5 to 7.6.0

Bumps [@babel/core](https://github.com/babel/babel) from 7.5.5 to 7.6.0.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.5.5...v7.6.0)

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

package.json

@@ -19,7 +19,7 @@
     "vue-router": "^3.1.2"
   },
   "devDependencies": {
-    "@babel/core": "^7.4.3",
+    "@babel/core": "^7.6.0",
     "@babel/preset-env": "^7.6.0",
     "@fullhuman/postcss-purgecss": "^1.2.0",
     "@vue/cli-plugin-babel": "^3.5.1",