Bump @babel/core from 7.7.5 to 7.7.7 (#12720)

Bumps [@babel/core](https://github.com/babel/babel) from 7.7.5 to 7.7.7.
- [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/v7.7.5...v7.7.7)

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

package.json

@@ -59,7 +59,7 @@
   },
   "private": true,
   "dependencies": {
-    "@babel/core": "^7.7.5",
+    "@babel/core": "^7.7.7",
     "@babel/plugin-proposal-class-properties": "^7.7.4",
     "@babel/plugin-proposal-decorators": "^7.7.4",
     "@babel/plugin-transform-react-inline-elements": "^7.7.4",