v6.2.1

[nhtzr]

• Add nullable: Added support to generate nullable attributes in schemas for swagger specs.
• Fix event namespaces: AdHoc channels for events did not respect namespaces when generating topic names.
• Add default modifier to enum attributes. Enum and primitves properties now can set a default value.
• Fix verb enum: events that included a rest resource generated an invalid json schema. (specifically included empty enum array)
• Fix env flag: it was being ignored and overriden with PROD in most places.
• Add Summary: syntax for summaries in swagger generated specs for operations
• Reword generated swagger descriptions for paginated APIs

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This discussion was created from the release v6.2.1.