fix: eslint config in package.json

[sAleksovski]

Summary

Fixes #86

Test Plan

1. Build the latest bob, generate project with "JavaScript module with Expo example and Web support"
2. Verify "root": true, is present in generated `package.json file

Checklist

• I have tested this on a device and a simulator
• I added the documentation in README.md
• I mentioned this change in CHANGELOG.md
• I updated the typed files (TS and Flow)
• I added a sample use of the API in the example project (example/App.js)

[krizzu]

Thanks!