Bail out during parsing of ISO-8601 date strings if we encounter a '/' character as the parser does not support time intervals and they cause invalid parsing
If a time zone cannot be extracted from the ISO-8601 date string then fall back to the default timezone of the date formatter
Migrate ISO-8601 date formatter to the beginning of the value transformer stack
Eliminate unnecessary `RKSetValueForObject` function
Migrate ISO-8601 date formatter to the beginning of the value transformer stack
Introduce `keyOfDictionaryValueTransformer`