Cannot add license key to generated package.json file in template

[lerickson-ds]

Describe the bug

When using the 4.0 alpha, I cannot figure out a way to add a license key to the package.json file in the template. Therefore when I create a project with my create-react-app template it always gives me the "warning ../../package.json: No license field" warning. Please add the ability to add a license key in the template.json file of the templates or let me know if there is already a way to achieve this.

Steps to reproduce

(Write your steps here:)

1. Using the 4.0 alpha of create-react-app and a custom template, add license key in template.json
2. Create a project with your custom template
3. Run 'yarn start'

Expected behavior

To start up with no warnings and have a "license" key in the package.json file.

Actual behavior

It started up, but with the "warning ../../package.json: No license field" warning and does not have a "license" key in the package.json file.

[stale]

This issue has been automatically marked as stale because it has not had any recent activity. It will be closed in 5 days if no further activity occurs.

[lerickson-ds]

This is still an issue, please leave it open. I will try to create a PR soon.