Update composer.json fabpot/goutte constraint

[epfremmer]

Removing goutte version 3 from supported driver versions. The problem being that behat/mink-extension passes server_parameters into the guzzle constructor nested in the 'default' key in the GoutteFactory::buildGuzzle4Client method. Guzzle 6 no longer uses the 'defaults' key. Thus the guzzle 6 client does not get the correct configuration.

see: https://github.com/Behat/MinkExtension/blob/master/src/Behat/MinkExtension/ServiceContainer/Driver/GoutteFactory.php#L71-L75 https://github.com/Behat/MinkExtension/blob/master/src/Behat/MinkExtension/ServiceContainer/Driver/GoutteFactory.php#L87-L95 https://github.com/Behat/MinkExtension/blob/master/src/Behat/MinkExtension/ServiceContainer/Driver/GoutteFactory.php#L97-L103

This can be restored once a pull request has been completed to the behat/mink-extension repo to add support for goutte3 http client creation. For now it would be ideal to reduce the composer constraint so as to not force people to require "fabpot/goutte": "~2.0" in order to use the driver with guzzle options since in most dev environments people are going to be passing 'verify' => false for self-signed certs.

[stof]

This is wrong. This driver perfectly supports Goutte 3 (see the testsuite).

If MinkExtension has an issue, you should open a PR on MinkExtension to fix it instead of trying to workaround it by changing dependencies of the driver.

[epfremmer]

Already working on it.