[OpenAPITools/openapi-generator] [Ocaml] Some types get generated with illegal characters in their names in the file support/Enums.ml

Created by: cgensoul

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

The file https://raw.githubusercontent.com/stripe/openapi/master/openapi/spec3.yaml describes types with '.' (dot) characters in their name which end up in OCaml type identifiers in the generated code which is illegal (namely in support/Enums.ml).

openapi-generator version

v5.0.0-beta2

OpenAPI declaration file content or url

https://raw.githubusercontent.com/stripe/openapi/master/openapi/spec3.yaml