Add Relay support

[blakegong]

May I know is it in your development scope to add Relay support? Specifically support babel-plugin-react-relay package by adding RELAY=true to .env file, to allow writing code like:

Relay.QL`/** some GraphQL queries **/`

I have tried to modify your customizers.js to achieve this and it works great. I would love to submit a pull request to your project as it is under great maintenance from you and is always on par with the newest react-scripts. May I know what do you think? :)

[valle-xyz]

+1

[valle-xyz]

@kitze for comparison: https://github.com/svrcekmichal/create-react-app

[kirill-konshin]

Just use Apollo