How to set the nullable parameter in the JSONRequestBodyValidator or a custom validator?

[glockenbach]

Its possible to register custom request/response validators.

The implementation provides a default validator which is constructed with a nullable and a required argument. I can change the required by defining the property in the specification but how can the nullable argument be changed?

connexion/connexion/validators/json.py

Lines 30 to 31 in 994f53f

	required=False,
	nullable=False,