[console] Rollback symfony/css-selector to 2.7
[console] Rollback symfony/css-selector to 2.7

revagomes/DrupalConsole,Cottser/DrupalConsole,revagomes/DrupalConsole,dkgndec/DrupalConsole,revagomes/DrupalConsole,dkgndec/DrupalConsole,dkgndec/DrupalConsole,Cottser/DrupalConsole,Cottser/DrupalConsole