feat(meta.swagger): Add support for model attribute meta.swagger

The `meta` attribute allows extensions to Sails Model attributes; add
`meta.swagger` to allow Swagger documentation to be added to the
OpenAPI.UpdatedSchema definition for the attribute.

Author: danielsharvey

lib/generators.ts

@@ -164,6 +164,11 @@ export const generateAttributeSchema = (attribute: Sails.AttributeDefinition): O
 
   // note: required --> required[] (not here, needs to be done at model level)
 
+  // finally, overwrite in custom swagger
+  if(ai.meta?.swagger) {
+    assign(schema, omit(ai.meta.swagger, 'exclude'));
+  }
+
   return schema;
 }