This patch was authored by @wibed and released by @tanner0101.

Allows for a boolean field to be stored as string.

.field("is_true", .string, .required)

Additionally it is now its separate type, together with the other types, instead of referring to an anonymous int for a return, which makes It cleaner.

Before: If the field type of a presumed boolean is set to string. it results in below error msg

typeMismatch(Swift.Bool, Swift.DecodingError.Context(codingPath: [], debugDescription: "Could not initialize Bool from \"0\".", underlyingError: nil))