Client methods are generated with mandatory parameters instead of varargs when default values are specified in the spec

[vdayanand]

Example:

spec

paths:
  /example:
    get:
      parameters:
        - name: limit
          in: query
          required: true
          schema:
            type: integer
            default: 10

Generated:

function get_example(limit::Int)
    # Call API...
end

Expected:

function get_example(limit::Int=10)
    # Call API...
end