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

@@ -40,7 +40,7 @@
   "dependencies": {},
   "devDependencies": {
     "@babel/cli": "^7.6.0",
-    "@babel/core": "^7.5.5",
+    "@babel/core": "^7.6.0",
     "@babel/plugin-transform-react-jsx": "^7.3.0",
     "@babel/preset-env": "^7.5.5",
     "autoprefixer": "^9.6.1",