Bump @babel/core from 7.11.5 to 7.11.6

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.11.5 to 7.11.6.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.11.6/packages/babel-core)

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

package.json

@@ -36,7 +36,7 @@
     "url": "https://github.com/wallabag/wallabag/issues"
   },
   "devDependencies": {
-    "@babel/core": "^7.11.5",
+    "@babel/core": "^7.11.6",
     "@babel/preset-env": "^7.11.5",
     "autoprefixer": "^9.8.6",
     "babel-eslint": "^10.1.0",