The io/ioutil package has been deprecated as of Go 1.16, see
https://golang.org/doc/go1.16#ioutil. This commit replaces the existing
io/ioutil functions with their new definitions in io and os packages.
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
* Add atlassiancrowd connector to list in readme
* Add TestIdentityFromCrowdUser
* Set preferred_username claim when configured
* Add preferredUsernameField option to docs
* Log warning when mapping invalid crowd field