Bump @babel/preset-env from 7.8.4 to 7.8.6

Bumps [@babel/preset-env](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](https://github.com/babel/babel/compare/v7.8.4...v7.8.6)

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

package.json

@@ -42,7 +42,7 @@
   "devDependencies": {
     "@babel/core": "7.8.4",
     "@babel/plugin-proposal-class-properties": "^7.8.3",
-    "@babel/preset-env": "^7.8.4",
+    "@babel/preset-env": "^7.8.6",
     "@babel/preset-react": "^7.8.3",
     "@svgr/webpack": "5.2.0",
     "@typescript-eslint/eslint-plugin": "1.13.0",