* Fix step definition output for Data Tables
This fixes incorrect step definition output for Data Tables. The
PickleStepArgument_PickleTable type does not exist in the current
messages-go version.
* updated CHANGELOG.md
Issue: It is not possible to use function without return when
matching steps, resulting in a lot of Nil only error
returns.
Fix: Allows to provide empty result function by correctly matching
reflect Calls on step Handler.
When nothing is returned by the Handler, it will return
nil as if errors was nil.
