Do you want to request a feature or report a bug?
Bug
What is the current behavior?

The "resolver" option is not considered valid, despite its presence in the documentation.
Repro: https://repl.it/G90C
(Just the default https://repl.it/languages/jest with "resolver": "something" added to config)
What is the expected behavior?
resolver should be a valid config option or it should be deprecated/not documented.