AnyOf and OpenAPI 3

Did you manage to solve the problem with openapi 3?
How did you solve the problem that models for AnyOf objects are not generated when using Open API 3?
@viclovsky 
I tried the latest version of openapi plugin
```
  <plugin>
      <groupId>org.openapitools</groupId>
      <artifactId>openapi-generator-maven-plugin</artifactId>
      <version>5.3.1</version>
```