Bump @babel/core from 7.8.4 to 7.8.6

Bumps [@babel/core](https://github.com/babel/babel) from 7.8.4 to 7.8.6.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](babel/babel@v7.8.4...v7.8.6)

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

package.json

@@ -40,7 +40,7 @@
     "superagent": "^5.2.2"
   },
   "devDependencies": {
-    "@babel/core": "^7.8.4",
+    "@babel/core": "^7.8.6",
     "@babel/preset-env": "^7.8.6",
     "@babel/preset-react": "^7.8.3",
     "babel-loader": "^8.0.6",