Unnecessary dependencies in handlebars template

[TomAFrench]

https://github.com/PaulRBerg/create-eth-app/blob/c71f66d47c844e1182bf73d3d82979c33b36a6c1/handlebars/react/packages/react-app/package.json.hbs#L39

I've just spotted that we're installing typescript in all templates. This looks like it's just adding to the install time for no benefit as it isn't being used (although people should).

[PaulRBerg]

I added the typescript dependency to silence this warning:

"workspace-aggregator-5a874fcd-c011-4afb-a6bb-3565ebe9b6b8 > @compound-app/react-app > react-scripts > @typescript-eslint/eslint-plugin > tsutils@3.17.1" has unmet peer dependency "typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta".

But yeah, we may want to remove it, since it's a heavy dependency. AFAIK, Create React App doesn't install it either.

[TomAFrench]

Yeah, I think so. I think these kind of warnings are just par for the course when it comes to using yarn