Missing prettier as dev dependency

[domoritz]

Prettier is missing as a dev dependency.

[sfc-gh-kbregula]

I agree. We have created a prettier configuration file, so it's worth adding a prettier as a dependency as well.

cookiecutter/{{ cookiecutter.package_name }}/{{ cookiecutter.import_name }}/frontend-react/.prettierrc
cookiecutter/{{ cookiecutter.package_name }}/{{ cookiecutter.import_name }}/frontend-reactless/.prettierrc
examples/CustomDataframe/custom_dataframe/frontend/.prettierrc
examples/MaterialLogin/material_login/frontend/.prettierrc
examples/RadioButton/radio_button/frontend/.prettierrc
examples/SelectableDataTable/selectable_data_table/frontend/.prettierrc
template-reactless/my_component/frontend/.prettierrc
template/my_component/frontend/.prettierrc