Fix schema types seriallization

[AlexGuzmanAtAbsa]

Strong data type serialization is lost because Swagger requires use of Schema[_] subtypes when modeling primitives, maps and arrays instead of the base Schema[_] class even if they have the same properties.

• Fixes serialization of various data types in case classes including Map, List, String, Boolean which were incorrectly serialized to Any type
• Update library versions

Tested using openapi Python generator. Verified types are now strongly typed and optional and mandatory fields are preseved as expected.

Test evidence

Example 1

case class StepFunctionDescriptor(
  arn: String,
  tags: Map[String, String] = Map.empty[String, String])

Current implementation:

            "StepFunctionDescriptor": {
                "properties": {
                    "arn": {},
                    "tags": {
                        "additionalProperties": {}
                    }
                },
                "required": [
                    "arn",
                    "tags"
                ]
            }

Notice above the absence of type for all properties resulting in the properties defaulting to Any in the generated OpenAPI JSON

After the fix:

           "StepFunctionDescriptor": {
                "type": "object",
                "properties": {
                    "arn": {
                        "type": "string"
                    },
                    "tags": {
                        "type": "object",
                        "additionalProperties": {
                            "type": "string"
                        }
                    }
                },
                "required": [
                    "arn",
                    "tags"
                ]
            },

Example 2

case class User(
  userName: String,
  firstName: Option[String],
  lastName: Option[String],
  mail: Option[String],
  groups: Seq[String])

Current implementation:

         "User": {
                "properties": {
                    "userName": {},
                    "firstName": {},
                    "lastName": {},
                    "mail": {},
                    "groups": {
                        "items": {}
                    }
                },
                "required": [
                    "groups",
                    "userName"
                ]
            }

After the fix:

           "User": {
                "type": "object",
                "properties": {
                    "userName": {
                        "type": "string"
                    },
                    "firstName": {
                        "type": "string"
                    },
                    "lastName": {
                        "type": "string"
                    },
                    "mail": {
                        "type": "string"
                    },
                    "groups": {
                        "type": "array",
                        "items": {
                            "type": "string"
                        }
                    }
                },
                "required": [
                    "groups",
                    "userName"
                ]
            }

[github-actions]

JaCoCo code coverage report - springdoc-openapi-scala-1

Overall Project	97.99% -6.62%	🍏
Files changed	84.18%	🍏

File	Coverage
OpenAPIModelRegistration.scala	97.94% -6.79%	🍏

[github-actions]

JaCoCo code coverage report - springdoc-openapi-scala-2

Overall Project	97.99% -6.62%	🍏
Files changed	84.18%	🍏

File	Coverage
OpenAPIModelRegistration.scala	97.94% -6.79%	🍏

[jakipatryk]

I am not 100% sure what this PR tries to fix, could you please provide an example what is wrong currently?

[AlexGuzmanAtAbsa]

@jakipatryk Added some before vs after examples.

[kevinwallimann]

I am not 100% sure what this PR tries to fix, could you please provide an example what is wrong currently?

We noticed that in our generated swagger docs (both api-docs endpoint and Swagger UI), certain types were missing from the properties, notably string or boolean. For some reason, integer types were present. Alex' examples are extracts from the api-docs endpoint