Typescript 4.1

[TeoTN]

It seems not to work with Typescript 4.1. The stack trace refers only to typescript paths but disabling the plugin in storybook has made it pass.

70% sealing React Docgen Typescript Plugin /Volumes/unix/.../node_modules/typescript/lib/typescript.js:2229
        return str.lastIndexOf(prefix, 0) === 0;
                   ^

TypeError: Cannot read property 'lastIndexOf' of undefined
    at Object.startsWith (/Volumes/unix/workplace/.../node_modules/typescript/lib/typescript.js:2229:20)

[hipstersmoothie]

Could you provide a reproduction repo? None of the libraries (this plugin + react-docgen-typescript) directly depend on typescript. You should be able to edit the yarn.lock file to make sure only 1 version is present in your project