Update CI config to support Elm 0.19
Description
Elm 0.19 has been released: https://elm-lang.org/blog/small-assets-without-the-headache
- no longer support --yes
- we will need to add elm.json or run
elm init
openapi-generator version
Latest master
Related issues/PRs
https://github.com/OpenAPITools/openapi-generator/pull/877
Suggest a fix/enhancement
If anyone wants to help on this, please reply to let us know and we'll show you some good starting points.