Just updated composer on a functioning Behat, and now getting the following messages open running behat.
PHP Deprecated: "Symfony\Component\Console\Helper\DialogHelper" is deprecated since version 2.5 and will be removed in 3.0.
Im using Behat-3 (~3.0@dev).
Any advice will be appreciated :)
I don't know what your composer.json looks like but I would suggest you to use stable versions for packages in require blocks. Try to use specific versions when possible.