source: frontend/node_modules/jsx-ast-utils/.babelrc

{
  "presets": ["env"],
  "plugins": [
    ["transform-replace-object-assign", { "moduleSpecifier": "object.assign" }],
    "transform-object-rest-spread",
    // "@babel/plugin-proposal-nullish-coalescing-operator", // TODO: update to babel 7
  ],
}