@babel/plugin-proposal-decorators decoratorsBeforeExport option does not work

[Arichy]

Bug Report

Current Behavior
I'm using create-react-app and @babel/plugin-proposal-decorators, and I want to write decorators before export keyword , so I add "decoratorsBeforeExport":true to .babelrc, but it throw an error.

Babel Configuration (.babelrc, package.json, cli command)

{
    "presets": [
        "react-app"
    ],
    "plugins": [
        [
            "@babel/plugin-proposal-decorators",
            {
                "decoratorsBeforeExport": true
            }
        ]
    ]
}

Environment

• Babel version(s): 7.x.x

• Node/npm version: node v11.13.0

• OS: OSX 10.14.4

• How you are using Babel: create-react-app

Additional context/Screenshots

[babel-bot]

Hey @Arichy! We really appreciate you taking the time to report an issue. The collaborators
on this project attempt to help as many people as possible, but we're a limited number of volunteers,
so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack
community that typically always has someone willing to help. You can sign-up here
for an invite.

[nicolo-ribaudo]

The official decorator proposals doesn't allow decorators before exports anymore.

Anyway, that option should still work in Babel. For some reasons that config files isn't being picked up, I think. Could you try using babel.config.js instad of .babelrc?

[GriffinCooksApps]

Removing this feature basically ruins decorators :(