Unable to load typescript-apollo-angular in codesandbox while attempting reproduce bug: serviceProvidedInRoot: false ignored

## Bug Description
Unable to utilise codesandbox to reproduce a different bug. Any error is presented:
Unable to find template plugin matching 'typescript-apollo-angular'
The plugin has been selected and loaded from the package.json file.

The original bug I was attempting to reproduce, was that the config option: `serviceProvidedInRoot: false` is ignored by graphql-codegen

## To Reproduce
Please see working demonstration of the bug here: https://codesandbox.io/s/agitated-fog-1j6kl?file=/codegen.yml

## Expected Behaviour

1. graphql-codegen should compile and run in the codesandbox instance
2. Angular services generated by graphql-codegen should be generated with `@Injectable()` when `serviceProvidedInRoot: false`

## Observed behaviour

1. graphql-codegen does not finish compiling because of error message: ``
2. Angular services are generated with `@Injectable({ providedIn: 'root' })` even when `serviceProvidedInRoot: false`