🚨(frontend) fix some eslint warnings

- Eslint tried to search some configs in the node_modules folder,
we ignore node_modules in the eslint config now.
- Adapt next eslint to use next/babel.

src/frontend/packages/i18n/.eslintrc.js

@@ -7,4 +7,5 @@ module.exports = {
     tsconfigRootDir: __dirname,
     project: ['./tsconfig.json'],
   },
+  ignorePatterns: ['node_modules'],
 };